TheManhattan address algorithm is a series of formulas used to estimate the closest east–west cross street forbuilding numbers on north–south avenues in theNew York City borough ofManhattan.

To find the approximate number of the closest cross street, divide the building number by a divisor (generally 20) and add (or subtract) the "tricky number" from the table below:^[1][2][3]

Street/Avenue	Building No.	Divisor	Tricky No.	(unrounded result)
Avenue A	All	${\displaystyle ÷20}$	${\displaystyle +3}$
Avenue B	All	${\displaystyle ÷20}$	${\displaystyle +3}$
Avenue C	All	${\displaystyle ÷20}$	${\displaystyle +3}$
Avenue D	All	${\displaystyle ÷20}$	${\displaystyle +3}$
1st Avenue	All	${\displaystyle ÷20}$	${\displaystyle +3}$
2nd Avenue	All	${\displaystyle ÷20}$	${\displaystyle +3}$
3rd Avenue	All	${\displaystyle ÷20}$	${\displaystyle +10}$
4th Avenue	All	${\displaystyle ÷20}$	${\displaystyle +8}$
5th Avenue	63–108	${\displaystyle ÷20}$	${\displaystyle +11}$	14.15–16.4
5th Avenue	109–199	${\displaystyle ÷20}$	${\displaystyle +13}$	18.45–23
5th Avenue	200–399	${\displaystyle ÷20}$	${\displaystyle +16}$	26.05–36
5th Avenue	400–599	${\displaystyle ÷20}$	${\displaystyle +18}$	38.05–48
5th Avenue	600–774	${\displaystyle ÷20}$	${\displaystyle +20}$	50.05–58.75
5th Avenue	775–1286	${\displaystyle ÷10}$	${\displaystyle -18}$	59.6–110.6
5th Avenue	1287–1499	${\displaystyle ÷20}$	${\displaystyle +45}$	110–120
5th Avenue	Above 1500	${\displaystyle ÷20}$	${\displaystyle +24}$	124+
6th Avenue / Avenue of the Americas	All	${\displaystyle ÷20}$	${\displaystyle -12}$
7th Avenue	1–1800	${\displaystyle ÷20}$	${\displaystyle +12}$	12.05–102
7th Avenue	Above 1800	${\displaystyle ÷20}$	${\displaystyle +20}$	110+
8th Avenue	All	${\displaystyle ÷20}$	${\displaystyle +9}$
9th Avenue	All	${\displaystyle ÷20}$	${\displaystyle +13}$
10th Avenue	All	${\displaystyle ÷20}$	${\displaystyle +14}$
11th Avenue	All	${\displaystyle ÷20}$	${\displaystyle +15}$
Amsterdam Avenue	All	${\displaystyle ÷20}$	${\displaystyle +59}$
Audubon Avenue	All	${\displaystyle ÷20}$	${\displaystyle +165}$
Columbus Avenue	All	${\displaystyle ÷20}$	${\displaystyle +60}$[3]
Broadway	1–754	(few numbered streets south of 8th)
Broadway	756–846	${\displaystyle ÷20}$	${\displaystyle -29}$	8.8–13.3
Broadway	847–953	${\displaystyle ÷20}$	${\displaystyle -25}$	17.35–22.65
Broadway	Above 953	${\displaystyle ÷20}$	${\displaystyle -31}$	16.65+
Central Park West	All	${\displaystyle ÷10}$	${\displaystyle +60}$
Convent Avenue	All	${\displaystyle ÷20}$	${\displaystyle +127}$
East End Avenue	All	${\displaystyle ÷20}$	${\displaystyle +79}$
Edgecombe Avenue	All	${\displaystyle ÷20}$	${\displaystyle +134}$
Ft. Washington Avenue	All	${\displaystyle ÷20}$	${\displaystyle +158}$
Lenox Avenue	All	${\displaystyle ÷20}$	${\displaystyle +110}$
Lexington Avenue	All	${\displaystyle ÷20}$	${\displaystyle +22}$
Madison Avenue	All	${\displaystyle ÷20}$	${\displaystyle +27}$
Manhattan Avenue	All	${\displaystyle ÷20}$	${\displaystyle +100}$
Park Avenue	All	${\displaystyle ÷20}$	${\displaystyle +34}$
Park Avenue South	All	${\displaystyle ÷20}$	${\displaystyle +8}$
Pleasant Avenue	All	${\displaystyle ÷20}$	${\displaystyle +101}$
Riverside Drive	1–567	${\displaystyle ÷10}$	${\displaystyle +72}$	72.1–128.7
Riverside Drive	Above 567	${\displaystyle ÷10}$	${\displaystyle +78}$	134.7+
St. Nicholas Avenue	All	${\displaystyle ÷20}$	${\displaystyle +110}$
Vanderbilt Avenue	All	${\displaystyle ÷20}$	${\displaystyle +42}$
Wadsworth Avenue	All	${\displaystyle ÷20}$	${\displaystyle +173}$
West End Avenue	All	${\displaystyle ÷20}$	${\displaystyle +59}$
York Avenue	All	${\displaystyle ÷20}$	${\displaystyle +4}$

For the north–south avenues, there are typically 20 address numbers between consecutive east–west streets (10 on either side of the avenue). A standardland lot on each avenue was originally 20 feet (6.1 m) wide,^[4] and there is about 200 feet (61 m) between each pair of east–west streets, for ten land lots between each pair of streets.^[5] The exceptions areRiverside Drive, as well asFifth Avenue andCentral Park West between 59th and 110th streets, which use a divisor of 10.^[3] These avenues all have buildings only on one side of the street, with a park on the other side.^[6]

The "tricky number" often corresponds to a street near the southern end of the avenue.^[6] There are some notable exceptions:

• York Avenue address numbers are continuations of Avenue A address numbers, since the avenue was originally called Avenue A.^[7]
• East End Avenue address numbers are continuations of Avenue B address numbers, since the avenue was originally called Avenue B.^[7]
• Sixth Avenue and Broadway start south ofHouston Street, the southern boundary of the Manhattan street numbering system.^[6]
• Although Park Avenue's southern terminus is at 32nd Street, a homeowner at 34th Street wanted the address "1 Park Avenue" (this was later changed).^[8]

For example, if you are at 62Avenue B,${\displaystyle 62÷20\approx 3}$, then add the "tricky number"${\displaystyle 3}$ to give${\displaystyle 6}$. The nearest cross street to 62 Avenue B isEast 6th Street.

If you are at 78Riverside Drive,${\displaystyle 78÷10\approx 8}$, then add the "tricky number"${\displaystyle 72}$ to give${\displaystyle 80}$. The nearest cross street to 78 Riverside Drive isWest 80th Street.

If you are at 5015th Avenue,${\displaystyle 501÷20\approx 25}$, then add the "tricky number"${\displaystyle 18}$ to give${\displaystyle 43}$. The nearest cross street to 501 5th Avenue is actually42nd Street, not43rd Street, as the Manhattan address algorithm only gives approximate answers.

• List of numbered streets in Manhattan
• Numbered street

• Streets in Manhattan
• Algorithms

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