Conversion de unitates refere afactores de conversion inter unitates demesura differente pro le mesmequantitate .Isto articulo da listas del factores de conversion pro multequantitates physic , como monstrate in le indice.
Le processo de conversion depende del situation specific e le fin intendite. Isto pote esser governate per regulation,contracto ,specification technic , o alterestandards publicate.Judicamento ingenierial pote includer factores como:
Alicun conversiones ab un systema a un altere debe esser exacte, sin augmentar o diminuer le precision del mesuration prime. Isto es appellate rarmenteconversion molle . Il non involve un cambio al configuration physic del detalio que es mesurate.Tamen, aconversion dur o unconversion adaptive pote non esser exactemente equivalente.Il cambia le mesuration a commode e practic numeros e unitates in le systema nove. Il pote involver un pauc differente configuration, o substitution de dimension, del detalio.
Conversion inter unitates in lesystema metric (SI ) pote esser discernite per lor prefixos -- pro exemplo, 1 kilogramma = 1000 grammas. Assi, illes es non listate in isto articulo. Exceptiones es facite si le unitate es communmente note per un altere nomine -- pro exemplo, 1 micron = 10-6 metro.Pro un lista complete de factores de multiplication, vide leprefixos del SI .
Intra omne tabella, le unitates es listate alphabeticamente, e le unitates del SI,base oderivate , es accentuate.
Pro cataquantitate physic , un numero de differente unitates es monstrate e exprimite in terminos del unitateSI correspondente.
Legenda Symbolo Definition = equala exactemente ˜ equala approximativemente digitos indica quedigitos repete infinitemente (pro exemplo8,294369 corresponde a8,294 369 369 369 369… ) (H) (de interesse historic)
Longitude Nomine del unitate Symbolo Definition Relation al unitates del SI ångström Å = 1×10-10 m = 0,1 nm astronomic unitate AU ≈ Distantia ab Terra al Sol ≈149 597 871 464 m [ 1] bohr,unitate atomic de longitude a0 =Bohr radio de hydrogeno ≈5,291 772 0859×10-11 ± 3,6×10-20 m[ 2] cablo, longitude de (Imperial) = 608ft ≈ 185,3184 m cablo, longitude de (International) = 1/10nmi = 185,2 m cablo, longitude de (S.U.A.) = 720ft = 219,456 m catena (de agrimensor)ch = 66ft (S.U.A) = 4virgas [ 3] ≈ 20,116 84 m clavo (drappo) = 2¼ in[ 4] =0,057 15 m cubito (H) = Distantia ab digitos a cubito ≈ 18in ≈ 0,5 m digito = 7/8 in =0,022 225 m digito (drappo) = 4½ in = 0,1143 m fathom fm = 6 ft[ 4] = 1,8288 m fermi fm = 1×10-15 m[ 4] = 1×10-15 m furlong fur = 10 catenas = 660 ft = 220 yd[ 4] = 201,168 m lega (terra)lea = 3 millias[ 3] =4 828,032 m ligamine (de Gunter; de agrimensor) lnk = 1/100 ch[ 4] =0,201 168 m ligamine (de Ramsden; de Ingeniero) lnk = 1 ft[ 4] = 0,3048 m linea ln = 1/12 in[ 5] =0,002 116 m Die luminal = 24 horas luminal =2,590 206 837 12×1013 m Hora luminal = 60 minutas luminal =1,079 252 8488×1012 m Minuta luminal = 60 Secundas luminal =1,798 754 748×1010 m Secunda luminal = Distantia lumine propaga in un secunda in vacuo =299 792 458 m Anno luminal l.y. = Distantia lumine propaga in vacuo in 365,25 dies[ 6] =9,460 730 472 5808×1015 m mano = 4 in[ 4] = 0,1016 m metro (unitate de base del SI )m = Distantia lumine propaga in1/299 792 458 secunda in vacuo.[ 7] polo/10 000 000 = 1 m micron µ = 1×10-6 m mil;thou mil = 1×10-3 in = 2,54×10-5 m millia (international)mi = 80 catenas =5280 pedes =1760 yd =1 609,344 m millia (tactical o data)= 6000 ft = 1828,8 m millia (S.U.A. Survey) mi =5280 ft (US Survey pedes) = (5280 ×1200/3937 ) m ˜1 609,347 219 m lega nautic NL; nl = 3 nmi[ 4] =5556 m millia nautic (Admiralty) NM (Adm); nmi (Adm) =6080 ft =1853,184 m millia nautic (international)NM; nmi =1852 m[ 8] =1852 m millia nautic (US pre 1954) = 1853,248 m = 1853,248 m passo = 2,5 ft[ 4] = 0,762 m palma = 3 in[ 4] = 0,0762 m parsec pc Distantia de stella conpar sec ≈3,085 677 82×1016 ± 6×106 m[ 9] pede (anglese: foot) (International)ft = 1/3 yd = 0,3048 m = 12 in = 0,3048 m pede (S.U.A. Survey) ft (US) =1200/3937 m[ 10] ≈0,304 800 610 m pica = 12 punctos Depende de puncto puncto (american, anglese)[ 11] [ 12] pt = 1/72,272in ≈0,000 351 450 m puncto (Didot; europee)[ 12] [ 13] pt = 1/12 × 1/72 of pied du roi; ˜0,000 375 97 m;0,000 375 939 85 m puncto (PostScript )[ 11] pt = 1/72in =0,000 3527 m puncto (TeX )[ 11] pt = 1/72,27in =0,000 351 4598 m quarto = ¼ yd = 0,2286 m span (H) = 9 in[ 4] = 0,2286 m spat[ 14] = 1×1012 m stigma; bicron (picometro ) pm = 1×10-12 m twip twp =1/1440 in = 1,7638 ×10-5 m uncia (anglese: inch) (International)in = 1/36 yd = 1/12 ft = 0,0254 m virga rd = 16½ ft = 5,0292 m x unitate ; siegbahnxu ≈ 1,0021×10-13 m[ 4] yard (International)yd = 0,9144 m[ 10] = 0,9144 m
Area Nomine de unitate Symbolo Definition Relation al unitates del SI acre (international)ac = 1 ch × 10 ch =4840 sq yd =4 046,856 4224 m2 acre (S.U.A.survey)ac = 10 sq ch =4840 sq yd ˜4 046,873 m2 [ 15] ar a = 100 m2 = 100 m2 barn b = 10-28 m2 = 10-28 m2 catena quadrate (international) sq ch = 66 ft × 66 ft = 1/10 ac =404,685 642 24 m2 catena quadrate (S.U.A. Survey) sq ch = 66 ft(SUA) × 66 ft(SUA) = 1/10 ac ˜404,687 3 m2 corda = 192 bd =1,486 448 64 m2 hectar ha =10 000 m2 =10 000 m2 kilometro quadrate km2 = 1 km × 1 km = 106 m2 ligamine quadrate (International) sq lnk = 1 lnk × 1 lnk = 0,66 ft × 0,66 ft =4,046 856 4224×10-2 m2 ligamine quadrate (SUA Survey) sq lnk = 1 lnk × 1 lnk = 0,66 ft(SUA) × 0,66 ft(SUA) ˜4,046 872×10-2 m2 ligamine quadrate (de Ramsden) sq lnk = 1 lnk × 1 lnk = 1 ft × 1 ft =0,09290304 m2 metro quadrate (unitate del SI )m2 = 1m × 1 m = 1 m2 mil circular; thou circular circ mil = π/4 mil2 ˜5,067 075×10-10 m2 mil quadrate; thou quadrate sq mil = 1 mil × 1 mil = 6,4516×10-10 m2 millia quadratesq mi = 1 mi × 1 mi =2,589 988 110 336×106 m2 millia quadrate (S.U.A. Survey)sq mi = 1 mi (SUA) × 1 mi (SUA) ˜2,589 998 47×106 m2 pede quadrate sq ft = 1 ft × 1 ft =9,290 304×10-2 m2 pede quadrate (S.U.A. Survey)sq ft = 1 ft (SUA) × 1 ft (SUA) ˜9,290 341 161 327 49×10-2 m2 planca (anglese: board) bd = 1 in × 1 ft =7,741 92×10-3 m2 quadrato (de tecto) = 10 ft × 10 ft =9,290 304 m2 rood ro = ¼ ac =1 011,714 1056 m2 section = 1 mi × 1 mi =2,589 988 110 336×106 m2 shed = 10-52 m2 = 10-52 m2 stremma =1 000 m2 =1 000 m2 township = 36 sq mi (SUA) ˜9,323 994×107 m2 uncia circularcirc in = π/4 sq in ˜5,067 075×10-4 m2 uncia quadrate sq in = 1 in × 1 in = 6,4516×10-4 m2 virga quadrate sq rd = 1 rd × 1 rd =25,292 852 64 m2 yard quadrate (International)sq yd = 1 yd × 1 yd =0,836 127 36 m2
Volumine Nomine de unitate Symbolo Definition Relation al unitates del SI acre-pede ac ft = 1 ac x 1 ft =43 560 ft3 =1 233,481 837 547 52 m3 acre-uncia = 1 ac × 1 in =102,790 153 128 96 m3 barril (Imperial)bl (Imp) = 36 gal (Imp) =0,163 659 24 m3 barril (petroleo) bl; bbl = 42 gal (SUA) =0,158 987 294 928 m3 barril (SUA sic) bl (SUA) = 105 qt (SUA) = 105/32 bu (SUA lvl) =0,115 628 198 985 075 m3 barril (SUA fluido) fl bl (SUA) = 31½ gal (SUA) =0,119 240 471 196 m3 bushel (Imperial)bu (Imp) = 8 gal (Imp) =0,036 368 72 m3 bushel (SUA sic (cumulate)) bu (SUA) = 1 ¼ bu (SUA lvl) =0,044 048 837 7086 m3 bushel (SUA sic (plan)) bu (SUA lvl) = 2 150,42 cu in =0,035 239 070 166 88 m3 butt, pipe = 126 gal (vino) =0,476 961 884 784 m3 carga (anglese: load) = 50 pedes cubic =1,415 842 3296 m3 coclear de servir (anglese: tablespoon) (Canadian) tbsp = ½ fl oz (Imp) =14,206 531 25×10-6 m3 coclear de servir (Imperial) tbsp = 5/8 fl oz (Imp) =17,758 164 0625×10-6 m3 coclear de servir (metric) = 15,0×10-6 m3 coclear de servir (S.U.A. (costumari)) tbsp = ½ SUA fl oz =14,786 764 7825×10-6 m3 coclear de servir (S.U.A. (etiquetta nutritional)) tbsp = 15 mL =1,5 ×10-5 m3 coclear de the (anglese: teaspoon) (Canadian) tsp = 1/6 fl oz (Imp) =4,735 510 416 ×10-6 m3 coclear de the (Imperial) tsp = 1/24 gi (Imp) =5,919 388 02083 ×10-6 m3 coclear de the (metric) = 5,0×10-6 m3 = 5,0×10-6 m3 coclear de the (S.U.A. (costumari)) tsp = 1/6 SUA fl oz =4,928 921 595×10-6 m3 coclear de the (S.U.A. (etiquetta nutritional)) tsp = 5 mL = 5,0×10-6 m3 coomb = 4 bu (Imp) =0,145 474 88 m3 corda (ligno focal) = 8 ft × 4 ft × 4 ft =3,624 556 363 776 m3 corda-pede = 16 cu ft =0,453 069 545 472 m3 cuppa (jentaculo) = 10 fl oz (Imp) =284,130 625×10-6 m3 cuppa (Canadian) c (CA) = 8 fl oz (Imp) = 227,3045×10-6 m3 cuppa (metric) c = 250,0×10-6 m3 = 250,0×10-6 m3 cuppa (S.U.A. costumari) c (SUA) = 8 SUA fl oz = 1/16 gal (SUA) =236,588 2365×10-6 m3 cuppa (S.U.A. (etiquetta nutritional)) c (SUA) = 240 mL[ 16] = 240,0×10-6 m3 dash (Imperial) = 1/384 gi (Imp) = ½ pinch (Imp) =369,961 751 302 083 ×10-9 m3 dash (SUA) = 1/96 SUA fl oz = ½ SUA pinch =308,057 599 609 375×10-9 m3 dram fluide (Imperial)fl dr = 1/8 fl oz (Imp) =3,551 632 8125×10-6 m3 dram fluide (S.U.A.)fl dr = 1/8 SUA fl oz =3,696 691 195 3125×10-6 m3 fathom cubiccu fm = 1 fm × 1 fm × 1 fm =6,116 438 863 872 m3 firkin = 9 gal (SUA) =0,034 068 706 056 m3 gallon (bira) bira gal = 282 cu in =4,621 152 048×10-3 m3 gallon (Imperial) gal (Imp) =4,546 09 L =4,546 09×10-3 m3 gallon (S.U.A sic) gal (SUA) = 1/8 bu (SUA lvl) =4,404 883 770 86×10-3 m3 gallon (S.U.A. fluido; vino)gal (SUA) = 231 cu in =3,785 411 784×10-3 m3 gill (Imperial) gi (Imp) = 5 fl oz (Imp) =142,065 3125×10-6 m3 gill (S.U.A) gi (SUA) = 4 SUA fl oz =118,294 118 25×10-6 m3 gutta (Imperial)gtt = 1/288 fl oz (Imp) =98,656 467 0138 ×10-9 m3 gutta (medical) = 1/12 ml = 83,03 ×10-9 m3 gutta (metric)) = 1/20 mL = 50,0×10-9 m3 gutta (S.U.A.) gtt = 1/360 SUA fl oz =82,148 693 22916 ×10-9 m3 gutta (U.S.) (alt) gtt = 1/456 SUA fl oz ˜64,854 231×10-9 m3 hogshead (Imperial)hhd (Imp) = 2 bl (Imp) =0.327 318 48 m3 hogshead (S.U.A.) hhd (SUA) = 2 fl bl (SUA) =0,238 480 942 392 m3 jigger (liquor) = 1½ SUA fl oz ˜ 44,36×10-6 m3 lambda λ = 1 mm3 = 1×10-9 m3 last = 80 bu (Imp) =2,909 4976 m3 litro L = 1 dm3 [ 17] = 0,001 m3 metro cubic (unitate del SI )m3 = 1 m × 1 m × 1 m = 1 m3 millia cubiccu mi = 1 mi × 1 mi × 1 mi =4 168 181 825,440 579 584 m3 minim (Imperial)min = 1/480 fl oz (Imp) = 1/60 fl dr (Imp) =59,193 880 2083 ×10-9 m3 minim (S.U.A.) min = 1/480 SUA fl oz = 1/60 SUA fl dr =61,611 519 921 875×10-9 m3 peck (Imperial)pk = 2 gal (Imp) =9,092 18×10-3 m3 peck (S.U.A. sic) pk = ¼ SUA lvl bu =8,809 767 541 72×10-3 m3 pede cubic cu ft = 1 ft × 1 ft × 1 ft =0,028 316 846 592 m3 pede de ligno = 1 cu ft =0,028 316 846 592 m3 pinch (Imperial) = 1/192 gi (Imp) = 1/8 tsp (Imp) =739,923 502 60416 ×10-9 m3 pinch (S.U.A.) = 1/48 SUA fl oz = 1/8 SUA tsp =616,115 199 218 75×10-9 m3 pinta (Imperial)pt (Imp) = 1/8 gal (Imp) =568,261 25×10-6 m3 pinta (S.U.A. sic) pt (SUA sic) = 1/64 bu (SUA lvl) = 1/8 gal (SUA sic) =550.610 471 3575×10-6 m3 pinta (S.U.A fluido) pt (SUA fl) = 1/8 gal (SUA) =473,176 473×10-6 m3 planca-pede (anglese: board-foot)fbm = 144 cu in =2,359 737 216×10-3 m3 pony = 3/4 SUA fl oz =22,180 147 171 875×10-6 m3 pottle; quartern = ½ gal (Imp) = 80 fl oz (Imp) =2,273 045×10-3 m3 quart (Imperial)qt (Imp) = ¼ gal (Imp) =1,136 5225×10-3 m3 quart (S.U.A. sic) qt (SUA) = 1/32 bu (SUA lvl) = ¼ gal (SUA sic) =1,101 220 942 715×10-3 m3 quart (S.U.A. fluido) qt (SUA) = ¼ gal (SUA fl) =946,352 946×10-6 m3 quarto;pail = 8 bu (Imp) =0,290 949 76 m3 quinto = 1/5 SUA gal =757,082 3568×10-6 m3 sacco (Imperial = 3 bu (Imp) =0,109 106 16 m3 sacco (S.U.A.) = 3 bu (SUA lvl) =0,105 717 210 500 64 m3 scruple fluide (Imperial) fl s = 1/24 fl oz (Imp) =1,183 877 60416 ×10-6 m3 seam = 8 bu (SUA lvl) =0,281 912 561 335 04 m3 shot = 1 SUA fl oz ˜ 29,57×10-6 m3 situla (anglese: bucket) (Imperial)bkt = 4 gal (Imp) =0,018 184 36 m3 strike (Imperial) = 2 bu (Imp) =0,072 737 44 m3 strike (S.U.A.) = 2 bu (SUA lvl) =0,070 478 140 333 76 m3 tonna (aqua) = 28 bu (Imp) =1,018 324 16 m3 tonna (displaciamento) = 35 cu ft =0,991 089 630 72 m3 tonna (frete) = 40 cu ft =1,132 673 863 68 m3 tonna (registro) = 100 cu ft =2,831 684 6592 m3 tun (vino) = 252 gal (vino) =0,953 923 769 568 m3 uncia cubiccu in = 1 in × 1 in × 1 in =16,387 064×10-6 m3 uncia fluide (fluido Imperial)fl oz (Imp) = 1/160 gal (Imp) =28,413 0625×10-6 m3 uncia fluide (fluido S.U.A. (costumari))SUA fl oz = 1/128 gal (SUA) =29,573 529 5625×10-6 m3 uncia fluide (fluido S.U.A. (etiquetta nutritional)) SUA fl oz = 30 mL[ 16] =3,0×10-5 m3 wey (S.U.A.) = 40 bu (SUA lvl) =1,409 562 806 6752 m3 yard cubiccu yd = 27 cu ft =0,764 554 857 984 m3
Angulo Plan Nomine de unitate Symbolo Definition Relation al unitate del SI arcominuta ' = 1°/60 ˜0,290 888×10-3 rad arcosecunda " =1°/3600 ˜4,848 137×10-6 rad circulo = 360° = 2π rad grado de arco ° = 1/360 de un revolution = π/180 rad ˜17,453 293×10-3 rad grad ; gradian; gongrad = 1/400 de un revolution = 2π/400 rad = 0.9° ˜ 15,707 963×10-3 rad mil angular µ =2π/6400 rad ˜0,981 748×10-3 rad minuta de arcocentesimal ' = 1 grad/100 ˜0,157 080×10-3 rad octante = 45° ˜0,785 398 rad quadrante = 90° ˜1,570 796 rad radian (unitate delSI )rad Le angulo subtendite al centro de un circulo per un arc con longitude equala le radio del circulo. Un toto revolution percurre 2π radians. = 1 rad semicirculo = 180° = π rad secunda de arcocentesimal " =1 grad/(10 000) ˜1,570 796×10-6 rad sextante = 60° ˜1,047 198 rad signo = 30° ˜0,523 599 rad
Angulo solide Nomine de unitate Symbolo Definition Relation al unitate del SI sphera = 4π sr = 4π sr steradian (unitate delSI )sr Le angulo solide subtendite al centro de un sphera de radio r per un portion del superficie del sphera con un area r2 . = 1 sr
Notas:
VidePeso pro detalio del distinction e conversion de massa/peso. In isto tabella, le unitategee es usate de denotargravitate standard pro evitar confusion del symbolo "g" pro grammas. Inphysica , lelibra de massa es rarmente scribitelbm de distinguer lo ab lelibra-fortia (lbf ). Es deberea non legere como le mesticiate unitate "libra metro". Massa Nomine de unitate Symbolo Definition Relation al unitates del SI unitate de massa atomic (unificate) u; AMU ˜1,660 538 73×10-27 ± 1,3×10-36 kg barca = 22½ sh tn =20 411,656 65 kg carat kt = 3 1/6 gr ˜205,196 548 333 mg carat (metric)ct = 200 mg = 200 mg centuple peso (anglese: hundredweight) (longe) longe cwt or cwt = 112 lb av =50,802 345 44 kg centuple peso (breve); cental br cwt = 100 lb av =45,359 237 kg clavo = 8 lb av =3,628 738 96 kg crith ˜ 89,9349 mg dalton Da ˜1,660 902 10×10-27 ± 1,3×10-36 kg dram (pharmacista;troy )dr t = 60 gr =3,887 9346 g dram (avoirdupois)dr av =27 11/32 gr =1,771 845 195 3125 g electronvolt eV = 1 eV (unitate de energia) / c2 = 1,7826×10-36 kg gamma ? = 1 µg =1,0×10-9 kg grano gr = 1/7000 lb av =64,798 91 mg grave G grave esseva le nomine original del kilogramma = 1 kg hyl (unitate delCGS ) = 1gee × 1 g × 1 s2 /m =9,806 65 g hyl (unitate delMKS ) = 1 gee × 1 kg × 1 s2 /m =9,806 65 kg kilogram kg = massa del prototypo presso Paris (~ massa de 1 litro de aqua) = 1 kg (unitate de base delSI ) kip kip =1000 lb av =453,592 37 kg lamina (anglese: sheet) = 1/700 lb av = 647,9891 mg libra (avoirdupois) lb av =0,453 592 37 kg = 7000 granos =0,453 592 37 kg libra (metric) = 500 g = 500 g libra (troy) lb t =5 760 granos =0,373 241 7216 kg mark = 8 oz t =248,827 8144 g massaelectronic me ˜9,109 382 15×10-31 ± 45×10-39 kg[ 18] mite = 1/20 gr =3,239 9455 mg mite (metric) = 1/20 g = 50 mg peso de penny dwt; pwt = 1/20 oz t =1,555 173 84 g puncto = 1/100 ct = 2 mg quarto (Imperial) = 1/4 longe cwt = 2 st = 28 lb av =12,700 586 36 kg quarto (informal) = ¼ tonna breve =226,796 185 kg quarto, longe (informal) = ¼ tonna longe =254,011 7272 kg quintal (metric)q = 100 kg = 100 kg scruple (pharmacista )s ap = 20 gr =1,295 9782 g sacco (caffe ) = 60 kg = 60 kg sacco (cemento de Portland ) = 94 lb av =42,637 682 78 kg slug ; geelibraslug = 1 gee × 1 lb av × 1 s2 /ft ˜14,593 903 kg stone st = 14 lb av =6,350 293 18 kg tonna, essayo (longe)AT = 1 mg × 1 longe tn ÷ 1 oz t ˜32,666 667 g tonna, essayo (breve)AT = 1 mg × 1 sh tn ÷ 1 oz t ˜29,166 667 g tonna, longe tn longe o tonna =2 240 lb =1 016,046 9088 kg tonna, breve tn br =2 000 lb =907,184 74 kg tonne (unitate delmts )t =1 000 kg =1 000 kg uncia (troy) oz t = 1/12 lb t =31,103 4768 g uncia (avoirdupois)oz av = 1/16 lb =28,349 523 125 g uncia (S.U.A. etiquetta nutritional) oz = 28 g = 28 g wey = 252 lb = 18 st =114,305 277 24 kg (variantes existe)
Densitate Nomine de unitate Symbolo Definition Relation al unitates del SI gram per millilitro g/mL = 1 kg/L = 1000 kg/m3 kilogramma per litro kg/L = kg/L = 1000 kg/m3 kilogramma per metro cubic (unitate delSI ) kg/m3 = kg/m3 = 1 kg/m3 libra (avoirdupois ) per pede cubic lb/ft3 ˜16,018 463 37 kg/m3 ˜16,018 463 37 kg/m3 libra (avoirdupois) per uncia (longitude) cubic lb/in3 = 1728 lb/ft3 ˜2,767 990 471×104 kg/m3 libra (avoirdupois) per gallon (Imperial) lb/gal ˜99,776 372 66 kg/m3 ˜99,776 372 66 kg/m3 libra (avoirdupois) per gallon (S.U.A. fluido) lb/gal ˜119,826 427 3 kg/m3 ˜119,826 427 3 kg/m3 slug per pede cubicslug/ft3 ˜515,378 818 4 kg/m3 ˜515,378 818 4 kg/m3 uncia (avoirdupois) per gallon (Imperial) oz/gal = 1/16 lb/gal ˜6,236 023 291 kg/m3 uncia (avoirdupois) per gallon (S.U.A. fluido) oz/gal = 1/16 lb/gal ˜7,489 151 707 kg/m3 uncia (avoirdupois) per pede cubic oz/ft3 = 1/16 lb/ft3 ˜1,001 1539 61 kg/m3 uncia (avoirdupois) per uncia (longitude) cubic oz/in3 = 108 lb/ft3 ˜1,729 994 044×103 kg/m3
Tempore Nomine de unitate Symbolo Definition Relation al unitates del SI anno (Gregorian)a = 365,2425 d medie, calculate ab annos commun (365 d), plus annos bissextil pro multe annos divisibile per 4. Videanno bissextil pro detalios. =31 556 952 s anno (Julian)a (y, yr in anglese) = 365,25 d medie, calculate ab annos commun (365 d), plus un anno bissextil (366 d) omne quatro annos. =31 557 600 s anno (sidereal)a = tempore pro Sol de retornar al mesme position relative al stellas del sphera celestial ≈365,256 363 d ≈31 558 149,7632 s anno (tropical)a = tempore pro Sol de retornar al mesme position in le cyclo de saisons ≈365,242 190 d ≈31 556 925 s unitate atomic de tempore au =a0 /(a ·c) ≈2,418 884 254×10-17 s cyclo Callippic = 441 menses (cave) + 499 menses (plen) = 76 annos de 365,25 dies =2,398 3776×109 s cyclo Hipparchic = 4 cyclos Callippic - 1 d =9,593 424×109 s cyclo Metonic ; enneadecaeteris = 110 me (cave) + 125 me (plen) = 6940 d ≈ 19 a =5,996 16×108 s cyclo Sothic =1 461 annos de 365 d =4,607 4096×1010 s decennio dec = 10 a = 10 × anno die d = 24 h =86 400 s die (sidereal)d = Tempore necessari pro le Terra de rotar un vice circa su axe, determinate per successive transitos de un multo distante objecto astronomic trans le meridian de un observator ≈86 164,1 s fortnight fn = 2 septimanas =1 209 600 s helek =1/1 080 h = 3,3 s hora h = 60 min =3 600 s jiffy j = 1/60 s = 0,016 s jiffy (alternate) ja = 1/100 s = 10 ms ke (quarto de un hora) = 1/4 h = 1/96 d = 60 × 60 / 4 s = 900 s = 60 / 4 min = 15 min ke (traditional) = 1/100 d = 24 × 60 × 60 / 100 s = 864 s = 24 * 60 / 100 min = 14,4 min lustre (lustrum) = 5 annos de 365 d = 1,5768×108 s mense (plen)me = 30 d[ 19] =2 592 000 s mense (Gregorian medie)me = 365,2425/12 d = 30,436875 d ≈2,6297×106 s mense (cave)me = 29 d[ 19] =2 505 600 s mense (synodic)me Tempore cyclic del phases del Luna ≈ 29,530589 dies (medie) ≈2,551×106 s millennio =1 000 a = 1000 × anno millidie md = 1/1 000 d = 24 × 60 × 60 /1 000 s = 86,4 s minuta min = 60 s = 60 s momento = 90 s = 90 s octaeteris = 48 me (plen) + 48 me (cave) + 3 me (plen) = 8 a of 365,25 d = 2922 d =2,524 608×108 s seculo c = 100 a = 100 × anno secunda s tempore de9 192 631 770 periodos del radiation correspondente al transition inter le 2hyperfin nivellos delstato fundamental de un atomo de caesium 133 a 0 K. (Altere secundas es rarmente usate in astronomia.) (Unitates de base del SI ) septimana sep = 7 d =604 800 s shake = 10-8 s = 10 ns sigma = 10-6 s = 1 µs svedberg S = 10-13 s = 100 fs tempore Planck = (G ℏ /c 5 )½ ≈1,351 211 868×10-43 s UbiUTC es observite, le longitude del unitates de tempore plus longe que 1 s pote accrescer o diminuer per 1 s si unsecunda bissextil occurre durante le intervallo temporal de interesse.
Frequentia Nomine de unitate Symbolo Definition Relation al unitates del SI hertz (unitate delSI )Hz = Numero de cyclos per secunda = 1 Hz = 1/s revolutions per minuta rpm = Un rpm equala un rotation complete circa un axe fixe in un minuta de tempore ≈0,104719755 rad/s = 1/60 Hz
Rapiditate Nomine de unitate Symbolo Definition Relation al unitates del SI furlong perfortnight (unitate humorose de physica) ≈ 1,96428 fph ≈1,663 095×10-4 m/s kilometro per hora km/h o kph = 1 km/h ≈0,621 371 192 mph ≈2,777 778×10-1 m/s metro per secunda (unitate delSI )m/s = 1 m/s = 3,6 kph ≈ 2,2369 mph = 1 m/s millia per hora mph = 1,46 fps =1,609 344 kph =0,447 04 m/s millia perminuta mpm = 60 mph = 88 fps = 26,8224 m/s millia persecunda mps = 3600 mph = 5280 fps =1 609,344 m/s nodo kn = 1NM /h = 1,852 km/h ≈0,514 444 m/s nodo (Admiralty)kn = 1 NM (Adm)/h =1,853 184 km/h =0,514 773 m/s Numero Mach M Ratio del rapiditate al rapiditate sonic in un material. (sin unitates) ≈ 340 a 295 m/s pro avion pede perhora fph = 1/3600 fps ≈ ˜8,466 667×10-5 m/s pede perminuta fpm = 1/60 fps ≈1,136 364×10-2 mph = 5,08×10-3 m/s pede persecunda fps = 1 ft/s = 0,681 mph = 3,048×10-1 m/s Velocitate de lumine in vacuoc =299 792 458 m/s =299 792 458 m/s rapidate sonic in aers Varia specialmente de temperatura - circa 761 mph (1225 kph) a nivello del mar a circa 660 mph (1062 kph), a altitudes avionic. ≈ 340 a 295 m/s a altitudes avionic uncia perminuta ipm = 1 in/min = 1/720 fps ˜4,23 333×10-4 m/s uncia persecunda ips = 1 in/s = 1/12 fps = 2,54×10-2 m/s
Unvelocitate consiste de un rapidate con un direction; le rapiditate parte del velocitate ha unitates de rapiditate.
Fluxo volumetric Nomine de unitate Symbolo Definition Relation al unitates del SI gallon (S.U.A. fluido) per die GPD = 1 gal/d =4,381 263 638 ×10-8 m3 /s gallon (S.U.A. fluido) per hora GPH = 1 gal/h =1,051 503 273 ×10-6 m3 /s gallon (S.U.A. fluido) per minuta GPM = 1 gal/min =6,309 019 64×10-5 m3 /s litro per hora LPH = 1 L/h = 2,7 ×10-7 m3 /s litro per minuta LPM = 1 L/min = 1,6 ×10-5 m3 /s litro per secunda LPS = 1 L/s = 0,001 m3 /s metro cubic per secunda (unitate delSI ) m3 /s = 1 m3 /s ≈ 2118,88 CFM = 1 m3 /s pede cubic per minuta CFM = 1 ft3 /min =4,719 474 432×10-4 m3 /s pede cubic per secunda ft3 /s = 1 ft3 /s = 60 CFM =0,028 316 846 592 m3 /s uncia cubic per minuta in3 /min = 1 in3 /min = 1728 CFM =2,731 1773 ×10-7 m3 /s uncia cubic per secunda in3 /s = 1 in3 /s = 103 680 CFM =1,638 706 4×10-5 m3 /s
Acceleration Nomine de unitate Symbolo Definition Relation al unitates del SI gal ; galileoGal = 1 cm/s2 = 10-2 m/s2 gravitate standard g =9,806 65 m/s2 ≈ 32,17405 fps2 =9,806 65 m/s2 nodo persecunda kn/s = 1 kn/s = 1 millia nautic /(h·s) ≈5,144 444×10-1 m/s2 metro per secunda quadrate (unitate delSI )m/s2 ≈ 3,28084 fps2 = 1 m/s2 = 1 m/s2 millia perhora persecunda mph/s = 1 mi/(h·s) = 4,4704×10-1 m/s2 millia perminuta persecunda mpm/s = 1 mi/(min·s) = 26,8224 m/s2 millia persecunda quadratemps2 = 1 mi/s2 =1,609 344×103 m/s2 pede perhora persecunda fph/s = 1 ft/(h·s) ≈8,466 667×10-5 m/s2 pede perminuta persecunda fpm/s = 1 ft/(min·s) = 5,08×10-3 m/s2 pede persecunda quadratefps2 = 1 ft/s2 = 3,048×10-1 m/s2 uncia perminuta persecunda ipm/s = 1 in/(min·s) ≈4,233 333×10-4 m/s2 uncia persecunda quadrateips2 = 1 in/s2 = 2,54×10-2 m/s2
Fortia Nomine de unitate Symbolo Definition Relation al unitates del SI dyne (cgs )dyn = g·cm/s2 = 10-5 N kilogramma-fortia ; kilopond;grave -fortiakgf; kp; Gf =g × 1 kg =9,806 65 N kip ; kip-fortiakip; kipf; klbf =g × 1 000 lb =4,448 221 615 2605×103 N milligrave -fortia, gravet-fortiamGf; gf =g =9,806 65 mN newton (unitate delSI )N Un fortia que pote dar un mass de 1 kg un acceleration de 1 metro per secunda quadrate.[ 20] = 1 N = 1 kg·m/s2 libra lb = slug·ft/s2 =4,448 230 531 N libra-fortia lbf =g × 1 lb =4,448 221 615 2605 N poundal pdl = 1 lb·ft/s2 =0,138 254 954 376 N sthene (unitate delmts ) sn = 1 t·m/s2 = 1×103 N tonna -fortiatnf =g × 1 tonna breve =8,896 443 230 521×103 N uncia-fortia ozf =g × 1 oz =0,278 013 850 953 7812 N unitate de fortia atomic = me ·a 2 ·c 2 /a0 ≈8,238 722 06×10-8 N[ 21]
Vide etiam: Conversions inter peso (fortia) e massa
Pression Nomine de unitate Symbolo Definition Relation al unitates del SI atmosphera (standard)atm =101 325 Pa[ 22] atmosphera (technic)at = 1 kgf/cm2 =9,806 65×104 Pa[ 22] bar bar = 105 Pa barye (unitate delcgs ) = 1 dyn/cm2 = 0,1 Pa centimetro de mercurio cmHg = 13 595,1 kg/m3 × 1 cm ×g ≈1,333 22×103 Pa[ 22] centimetro deaqua (4 °C) cmH2 O ≈ 999,972 kg/m3 × 1 cm ×g ≈ 98,0638 Pa[ 22] kilogramma-fortia per millimetro quadrate kgf/mm2 = 1 kgf/mm2 =9,806 65×106 Pa[ 22] kip peruncia quadrateksi = 1 kipf/sq in ≈6,894 757×106 Pa[ 22] micron (micrometro) de mercurio μ {\displaystyle \mu } =13 595,1 kg/m3 × 1μ {\displaystyle \mu } g ≈ 0.001 torr ≈0,133 3224 Pa[ 22] millimetro de mercurio mmHg =13 595,1 kg/m3 × 1 mm ×g ≈ 1 torr ≈ 133,3224 Pa[ 22] millimetro deaqua (3,98 °C) mmH2 O ≈ 999,972 kg/m3 × 1 mm ×g =0,999 972 kgf/m2 =9,806 38 Pa pascal (unitate delSI )Pa = N/m2 = kg/(m·s2 ) = 1 Pa[ 23] libra perpede quadratepsf = 1 lbf/ft2 ≈47,880 25 Pa[ 22] libra per uncia (longitude) quadrate psi = 1 lbf/in2 ≈6,894 757×103 Pa[ 22] pede deaqua (39,2 °F)ftH2 O ≈ 999,972 kg/m3 × 1 ft ×g ≈2,988 98×103 Pa[ 22] pede de mercurio (conventional)ftHg =13 595,1 kg/m3 × 1 ft ×g ≈40,636 66×103 Pa[ 22] pièze (unitate delmts ) pz =1 000 kg/m·s2 = 1×103 Pa = 1 kPa poundal per pede quadratepdl/sq ft = 1 pdl/sq ft ≈1,488 164 Pa[ 22] tonna breve per pede quadrate = 1 tn br ×g / 1 sq ft ≈95,760 518×103 Pa torr torr =101 325/760 Pa ≈ 133,3224 Pa[ 22] uncia deaqua (39,2 °F)inH2 O ≈ 999,972 kg/m3 × 1 in ×g ≈ 249,082 Pa[ 22] uncia de mercurio (conventional)inHg =13 595,1 kg/m3 × 1 in ×g ≈3,386 389×103 Pa[ 22]
Energia (general)Nomine de unitate Symbolo Definition Relation al unitates del SI cavallo-vapor -hora hp·h = 1 hp × 1 h =2,684 519 537 696 172 792×106 J centimetro cubic deatmosphera ; standard centimetro cubic cc atm; scc = 1 atm × 1 cm3 =0,101 325 J electronvolt eV =e ≈1,602 177 33×10-19 ± 4,9×10-26 J erg (unitate delcgs )erg = 1 g·cm2 /s2 = 10-7 J gallon -atmosphera (imperial)imp gal atm = 1 atm × 1 gal (imp) =460,632 569 25 J gallon-atmosphera (SUA) SUA gal atm = 1 atm × 1 gal (SUA) =383,556 849 0138 J hartree ,unitate atomic de energia Eh = me ·a 2 ·c 2 (= 2 Ry) ≈4,359 744×10-18 J joule (unitate delSI )J Le travalio facite per un fortia de 1 newton de mover le puncto applicational un distantia de 1 metro in le direction del fortia.[ 20] = 1 J = 1 m·N = 1 kg·m2 /s2 kilowatt-hora kW·h = 1 kW × 1 h = 3,6×106 J litro -atmosphera l atm; sl = 1 atm × 1 L = 101,325 J megatonna (deTNT )MT = 4,184×1022 ergs = 106 tTNT = 4,184×1015 J pede cubic de atmosphera; standard pede cubiccu ft atm; scf = 1 atm × 1 ft3 =2,869 204 480 9344×103 J pede libra ft lbf =g × 1 lb × 1 ft =1,355 817 948 331 4004 J pede-poundal ft pdl = 1 lb·ft2 /s2 =4,214 011 009 380 48×10-2 J rydberg Ry =R8 h ·c ≈2,179 872×10-18 J tonna deTNT tTNT = 1 Gcalth = 4,184×1016 ergs = 4,184×109 J uncia (longitude) libra in lbf =g × 1 lb × 1 in =0,112 984 829 027 6167 J yard cubic de atmosphera; standard yard cubiccu yd atm; scy = 1 atm × 1 yd3 =77,468 520 985 2288×103 J
Energia Thermal o Quantitate de CalorNomine de unitata Symbolo Definition Relation al unitates del SI barril de oleo equivalente bboe ≈ 5,8×106 BTU59 °F ≈ 6,12×109 J britannic thermal unitate (ISO)BTUISO = 1,0545×103 J = 1,0545×103 J britannic thermal unitate (International Tabella) BTUIT =1,055 055 852 62×103 J britannic thermal unitate (medie) BTUmed ≈1,055 87×103 J britannic thermal unitate (thermochemical) BTUth ≈1,054 350×103 J britannic thermal unitate (39 °F) BTU39 °F ≈1,059 67×103 J britannic thermal unitate (59 °F) BTU59 °F =1,054 804×103 J =1,054 804×103 J britannic thermal unitate (60 °F) BTU60 °F ≈1,054 68×103 J britannic thermal unitate (63 °F) BTU63 °F ≈ 1,0546×103 J caloria (International Tabella)calIT = 4,1868 J = 4,1868 J caloria (medie) calmed ≈4,190 02 J caloria (thermochemical) calth = 4,184 J = 4,184 J caloria (3,98 °C) cal3,98 °C ≈ 4,2045 J caloria (15 °C) cal15 °C = 4,1855 J = 4,1855 J caloria (20 °C) cal20 °C ≈ 4,1819 J Celsius unitate caloric (International Tabella)CHUIT = 1 BTUIT × 1 K/°R =1,899 100 534 716×103 J kilocaloria;caloria grande kcal; Cal =1 000 calIT = 4,1868×103 J pede cubic de methano =1 000 BTUIT =1,055 055 852 62×106 J quad = 1015 BTUIT =1,055 055 852 62×1018 J therm (E.C.) =100 000 BTUIT =105,505 585 262×106 J therm (S.U.A.) =100 000 BTU59 °F = 105,4804×106 J thermie th = 1 McalIT = 4,1868×106 J tonna de carbon equivalente TCE = 7 Gcalth = 29,3076×109 J tonna de oleo equivalente TOE = 10 Gcalth = 41,868×109 J
Potentia Nomine de unitate Symbolo Definition Relation al unitates del SI atmosphera -centimetro cubic perminuta atm ccm = 1 atm × 1 cm3 /min =1,688 75×10-3 W atmosphera-centimetro cubic persecunda atm ccs = 1 atm × 1 cm3 /s =0,101 325 W atmosphera-pede cubic perhora atm cfh = 1 atm × 1 cu ft/h =0,797 001 244 704 W atmosphera-pede cubic per minuta atm·cfm = 1 atm × 1 cu ft/min =47,820 074 682 24 W atmosphera-pede cubic per secunda atm cfs = 1 atm × 1 cu ft/s =2,869 204 480 9344×103 W BTU (IT) per horaBTUIT /h = 1 BTUIT /h ≈0,293 071 W BTU (IT) per minuta BTUIT /min = 1 BTUIT /min ≈17,584 264 W BTU (IT) per secunda BTUIT /s = 1 BTUIT /s =1,055 055 852 62×103 W calorie (IT) per secundacalIT /s = 1 calIT /s = 4,1868 W cavallo-vapor (anglese: horsepower) (caldiera)bhp ≈ 34.5 lb/h × 970.3 BTUIT /lb ≈9,810 657×103 W cavallo-vapor (europee electric) hp = 75 kp·m/s = 736 W cavallo-vapor (Imperial electric) hp = 746 W = 746 W cavallo-vapor (Imperial mechanic) hp = 550 ft lbf/s =745,699 871 582 270 22 W cavallo-vapor (metric) hp = 75 m kgf/s =735,498 75 W litro -atmosphera per minutaL·atm/min = 1 atm × 1 L/min =1,688 75 W litro-atmosphera per secunda L·atm/s = 1 atm × 1 L/s = 101,325 W lusec lusec = 1 L·µmHg/s ≈ 1,333×10-4 W poncelet p = 100 m kgf/s = 980,665 W pede-libra-fortia per hora ft lbf/h = 1 ft lbf/h ≈3,766 161×10-4 W pede-libra-fortia per minuta ft lbf/min = 1 ft lbf/min =2,259 696 580 552 334×10-2 W pede-libra-fortia per secunda ft lbf/s = 1 ft lbf/s =1,355 817 948 331 4004 W pede quadrate equivalente radiation directe sq ft EDR = 240 BTUIT /h ≈70,337 057 W tonna de climatisation = 1 t glacie disgelate / 24 h ≈3 504 W tonna de refrigeration (Imperial) = 1 BTUIT × 1 lng tn/lb ÷ 10 min/s ≈3,938 875×103 W tonna de refrigeration (IT) = 1 BTUIT × 1 sh tn/lb ÷ 10 min/s ≈3,516 853×103 W watt (unitate delSI )W Le potentia que in un secunda de tempore rende un joule de energia.[ 20] = 1 W = 1 J/s = 1 N·m/s = 1 kg·m2 /s3
Viscositate dynamicNomine de unitate Symbolo Definition Relation al unitates del SI libra per pede hora lb/(ft·h) = 1 lb/(ft·h) ≈4,133 789×10-4 Pa·s libra per pede secunda lb/(ft·s) = 1 lb/(ft·s) ≈1,488 164 Pa·s libra-fortia secunda per pede quadrate lbf·s/ft2 = 1 lbf·s/ft2 ≈47,880 26 Pa·s libra-fortia secunda per uncia quadrate lbf·s/in2 = 1 lbf·s/in2 ≈ 6894,757 Pa·s pascal secunda (unitate delSI )Pa·s = N·s/m2 , kg/(m·s) = 1 Pa·s poise (unitate delcgs )P = 10-1 Pa·s = 0,1 Pa·s
Viscositate kinematicNomine de unitate Symbolo Definition Relation al unitates del SI metro quadrate per secunda (unitate delSI ) m2 /s = 1 m2 /s = 1 m2 /s pede quadrate per secunda ft2 /s = 1 ft2 /s =0,092 903 04 m2 /s stokes (unitate delcgs )St = 10-4 m2 /s = 10-4 m2 /s
Dipolo electric Nomine de unitate Symbolo Definition Relation al unitates del SI unitate atomic de momento de dipolo electric ea 0 ≈8,478 352 81×10-30 C·m[ 25]
Voltage ,fortia electromotive , o differentia de potential electricNomine de unitate Symbolo Definition Relation al unitates del SI abvolt (unitate delcgs )abV = 1×10-8 V = 1×10-8 V statvolt (unitate delcgs )statV =c =299,792 458 V volt (unitate delSI )V Le differentia in potential electric trans 2 punctos sur un filo conductive portante 1 ampere currente constante si le potentia dissipate inter le punctos equala 1 watt.[ 20] = 1 V = 1 W/A =1 kg·m2 /(A·s3 )
Resistentia electric Nomine de unitate Symbolo Definition Relation al unitates delSI ohm (unitate delSI )Ω Le resistentia inter 2 punctos in un conductor si 1 volt de differentia de potential electric, applicate al punctos, causa 1 ampere de currente in le conductor.[ 20] = 1 Ω = 1 V/A =1 kg·m2 /(A2 ·s3 )
Capacitate electric Nomine de unitate Symbolo Definition Relation al unitates del SI farad (unitate delSI )F Le capacitate inter 2 plattas parallel que resulta in 1 volt de differentia potential si cargate per 1 coulomb de eletricitate.[ 20] = 1 F = 1 C/V =1 A2 ·s4 /(kg·m2 )
Fluxo de induction magnetic Name of unitate Symbolo Definition Relation al unitates del SI maxwell (unitate delcgs )Mx = 10-8 Wb[ 26] = 1×10-8 Wb weber (unitate delSI )Wb Fluxo de induction magnetic que, concatenante un circuito de un anello, causarea in le circuito un fortia electromotive de 1 volt si le fluxo esseva reducite a zero per un taxa uniforme in 1 secunda.[ 20] = 1 Wb = 1 V·s =1 kg·m2 /(A·s2 )
Nota: que physicos appellacampo magnetic es appellate densitate defluxo magnetic per ingenieros electric einduction magnetic per mathematicos applicate e ingenieros electric.
Induction magnetic o densitate de fluxo magneticNomine de unitate Symbolo Definition Relation al unitates del SI gauss (unitate delcgs )G =Mx /cm2 = 10-4 T = 1×10-4 T[ 27] tesla (unitate delSI )T =Wb /m2 = 1 T = 1 Wb/m2 =1 kg/(A·s2 )
Inductantia Nomine de unitate Symbolo Definition Relation al unitates del SI henry (unitate delSI )H Le inductantia de un circuito claudite que causa 1 volt de fortia electromotive si le currente in le circuito varia per un taxa uniforme de 1 ampere per secunda. = 1 H = 1 Wb/A =1 kg·m2 /(A·s)2
Entropia de information Nomine de unitate Symbolo Definition Relation al unitates del SI units ban ; hartleyban; Hart = ln(10) ×kB =3,179 065 3(53)×10-23 J/K bit ;shannon bit; b; Sh = ln(2) ×kB = 1 bit =9,569 940 (16)×10-24 J/K byte B = 8 bits =7,655 952 (13)×10-23 J/K joule perkelvin , (unitate delSI )J/K = J/K = 1 J/K kilobyte (decimal)kB =1 000 B =7,655 952 (13)×10-20 J/K kilobyte (kibibyte )KB; KiB =1 024 B = 210 bits =7,839 695 (13)×10-20 J/K nat ; nip; nepitnat =kB =1,380 650 5(23)×10-23 J/K nibble = 4 bits =3,827 976 0(64)×10-23 J/K
Nota: lecandela es le nomenclatura preferite pro le unitate del SI.
Intensitate luminose Nomine de unitate Symbolo Definition Relation al unitates del SI candela (unitate de base delSI )cd Le intensitate luminose, in un direction specific, de un origine que emitte radiation monochromatic de frequentia 540×1012 hertz e que ha un intensitate radiante in le direction de 1/683 watt per steradian.[ 7] = 1 cd potentia candelic (nove) cp = 1 cd Le usage del unitatepotentia candelic es discoragiate, proque illo es ambigue. = 1 cd potentia candelic (vetere, pre-1948) cp Varia e es non ben reproducibile.[ 28] ≈ 0,981 cd
Luminantia Nomine de unitate Symbolo Definition Relation al unitates del SI candela per pede quadrate cd/ft2 = cd/ft2 ≈10,763 910 417 cd/m2 candela per uncia quadrate cd/in2 = cd/in2 ≈1550,003 1 cd/m2 candela per metro quadrate (unitate delSI )cd/m2 = cd/m2 = 1 cd/m2 lambert L = (104 /p) cd/m2 ≈3183,098 861 8 cd/m2 pede-lambert fL = (1/p) cd/ft2 ≈3,426 259 099 6 cd/m2 stilb (unitate delCGS )sb = 104 cd/m2 ≈ 1×104 cd/m2
Fluxo luminose Nomine de unitate Symbolo Definition Relation al unitates del SI lumen (unitate delSI )lm = cd·sr = 1 lm = 1 cd·sr
Illuminantia Nomine de unitate Symbolo Definition Relation al unitates del SI lumen per uncia quadrate lm/in2 = lm/in2 ≈ 1550,0031 lx lux (unitate delSI )lx = lm/m2 = 1 lx = 1 lm/m2 Pede-candela; lumen per pede quadrate fc = lm/ft2 =10,763 910 417 lx phot (unitate delCGS )ph = lm/cm2 = 1×104 lx
Radioactivitate , Activitate de OrigineNomine de unitate Symbolo Definition Relation al unitates del SI becquerel (unitate delSI )Bq = Numero de disintegrations per secunda = 1 Bq = 1/s curie Ci = 3,7×1010 Bq = 3,7×1010 Bq[ 29] rutherford (H)rd = 1 MBq = 1×106 Bq
Nota: ben que becquerel (Bq) e hertz (Hz) ambe ultimatemente refere al mesme unitate de base del SI (s-1 ), Hz es usate solmente pro phenomenos periodic, e Bq es usate solmente pro processos stochastic associate con radioactivitate.[ 30]
Radiation - exposition Nomine de unitate Symbolo Definition Relation al unitates del SI roentgen R 1 R = 2,58×10-4 C/kg[ 26] = 2,58×10-4 C/kg
Nota: leroentgen es non un unitate del SI, e leNIST discoragia solidemente usage de lo.[ 26]
Radiation -dose absorbite Nomine de unitate Symbolo Definition Relation al unitates del SI gray (unitate delSI )Gy = 1 J/kg = 1 m2 /s2 [ 31] = 1 Gy rad rad = 0,01 Gy[ 26] = 0,01 Gy
Nota: ben que le definitions pro sievert(Sv) e gray (Gy) sembla indicar que illos mesura le mesme quantitates, iste es non le caso. Vide le articulodose equivalente .
Programmatura computatorial tal comofolios calculative subinde ha unitate convertitores o pote accessar convertitores libere via le Internet. Istes programmas pote facilemente converter unitates e mesurationes, sed solmente si le unitates es explicitemente definite e le conversion es compatibile (pro exemplo, cmHg a kPa).Avantiate calculatores electronic ha functionalitate pro conversion de unitates. Programmatura pro applications mathematic, scientific, e technic subinde include convertitores.
↑ United States Naval Observatory . (2009).Selected Astronomical Constants, 2009 ↑ "NIST Reference on Constants, Units, and Uncertainty." (2006).National Institute of Standards and Technology . Retrieved February 22, 2008. ↑3,0 3,1 National Institute of Standards and Technology General Tables of Units of Measurement ↑4,00 4,01 4,02 4,03 4,04 4,05 4,06 4,07 4,08 4,09 4,10 4,11 Lide, D. (Ed.). (1990). Handbook of Chemistry and Physics (71st ed). Boca Raton, FL: CRC Press. Section 1. ↑ Klein, Herbert Arthur.(1988).The Science of Measurement: a Historical Survey . Mineola, NY: Dover Publications0-4862-5839-4 . ↑ The International Astronomical Union and Astronomical Units ↑7,0 7,1 7,2 The International System of Units, Section 2.1,Bureau International des Poids et Mesures http://www.bipm.org/en/si/si_brochure/chapter2/2-1/ Error de citation: Etiquetta<ref> invalide; le nomine "sibaseunits" es definite plure vices con contento differente ↑ International System of Units, Bureau International des Poids et Mesures , Section 4.1 Table 8.↑ P. Kenneth Seidelmann, Ed. (1992).Explanatory Supplement to the Astronomical Almanac. Sausalito, CA: University Science Books. p. 716 and s.v. parsec in Glossary. ↑10,0 10,1 National Bureau of Standards. (June 30, 1959).Refinement of values for the yard and the pound . Federal Register, viewed September 20, 2006 atNational Geodetic Survey web site . ↑11,0 11,1 11,2 Whitelaw, Ian. (2007).A Measure of All Things: The Story of Man and Measurement 0-312-37026-1 . p. 152. ↑12,0 12,1 De Vinne, Theodore Low (1900).The practice of typography: a treatise on the processes of type-making, the point system, the names, sizes, styles and prices of plain printing types ↑ Pasko, Wesley Washington (1894).American dictionary of printing and bookmaking ↑ http://www.unc.edu/~rowlett/units/index.html ↑ Thompson, A. and Taylor, B.N. (2008).Guide for the Use of the International System of Units (SI) .National Institute of Standards and Technology Special Publication 811. p. 57. ↑16,0 16,1 http://ecfr.gpoaccess.gov/cgi/t/text/text-idx?c=ecfr&rgn=div8&view=text&node=21:2.0.1.1.2.1.1.6&idno=21 ↑ Barry N. Taylor, Ed.,NIST Special Publication 330: The International System of Units (SI) ↑ CODATA Value: atomic uint of mass. National Institute of Standards and Technology . Retrieved 16 September 2008.↑19,0 19,1 Pedersen O. (1983). "Glossary" inCoyne, G. , Hoskin, M., and Pedersen, O.Gregorian Reform of the Calendar: Proceedings of the Vatican Conference to Commemorate its 400th Anniversary . Vatican Observatory. Available fromAstrophysics Data System . ↑20,0 20,1 20,2 20,3 20,4 20,5 20,6 20,7 Comité International des Poids et Mesures, Resolution 2, 1946,http://www.bipm.org/en/CIPM/db/1946/2/ ↑ CODATA Value: atomic unit of force National Institute of Standards and Technology . Retrieved September 14, 2008.↑22,00 22,01 22,02 22,03 22,04 22,05 22,06 22,07 22,08 22,09 22,10 22,11 22,12 22,13 22,14 22,15 Barry N. Taylor, (April 1995),Guide for the Use of the International System of Units (SI) ↑ Barry N. Taylor, (April 1995),Guide for the Use of the International System of Units (SI) (NIST Special Publication 811), Washington, DC: U.S. Government Printing Office, p. 5. ↑ International System of Units, Bureau International des Poids et Mesures , Section 4.1 Table 7.↑ http://physics.nist.gov/cgi-bin/cuu/Value?auedm ↑26,0 26,1 26,2 26,3 NIST Guide to SI Units, Appendix B.9 (http://physics.nist.gov/Pubs/SP811/appenB9.html )Error de citation: Etiquetta<ref> invalide; le nomine "nistguide" es definite plure vices con contento differente ↑ Standard for the Use of the International System of Units (SI): The Modern Metric System IEEE/ASTM SI 10-1997. (1997). New York and West Conshohocken, PA:Institute of Electrical and Electronics Engineers andAmerican Society for Testing and Materials . Tables A.1 through A.5.↑ http://physics.nist.gov/cuu/Units/candela.html ↑ Ambler Thompson & Barry N. Taylor. (2008).Guide for the Use of the International System of Units (SI) .National Institute of Standards and Technology . p. 10. ↑30,0 30,1 http://www.bipm.org/en/si/si_brochure/chapter2/2-2/table3.html Error de citation: Etiquetta<ref> invalide; le nomine "sibrochure222" es definite plure vices con contento differente ↑ Ambler Thompson & Barry N. Taylor. (2008).Guide for the Use of the International System of Units (SI) .National Institute of Standards and Technology . p. 5. Nota 
