With thenumber of days calculator, you'll learnhow many days there are between two dates in time! Stick around, and you'll quickly learnhow to calculate the number of days between two dates of your choosing.

Thenumber of days calculator is easy to use and yet powerful in its features:

1. If you havetwo dates, you can enter them into theFrom andTo fields. The number of days between these two dates will be calculated and reported in theTime between field.
2. If you want to determine the date of the day that'sx days after a starting date, then enter that date inFrom and the number of days inTime between — you'll find the end date in theTo field.
3. The same goes for going backward in timex days from an end date — enter the number of days inTime between and the end date inTo.
4. If you want to see how your number of days translates toweeks, months, and years, you canchange the unit ofTime between to have it calculated for you!

If you want to get more precise, you can use these three additional features of the calculator:

• Include end date: Include or exclude the end date;
• Business days: Count only business days (Monday to Friday and not Saturday or Sunday); and
• Custom time: Count only certain days of the week.

It's a simple question with difficult implications — how many days are there between two dates? It gets more difficult the further these two dates are from each other in time. Let's look at some examples and see what we mean!

🔎 In all the example calculations below, weexclude the end date. If we wish to include the end date, we'd need to add1 day to each result.

Same month and same year

If both dates arein the same month of the same year, you can subtract the dates' calendar day numbers from each other. For example, April 4, 2022 and April 17, 2022 are17 − 4 = 13 days apart.

Same year but different months

If both dates arein the same year but not the same month, you can work out the number of days from January 1 (of that year) to both your dates and subtract these two differences. To do that, you need the number of days in each month of that year (remember to check for leap years).

For example, if we want to figure out how many days are between May 17, 2022, and July 8, 2022, we'd work them both back to January 1 of 2022:

• There are31 + 28 + 31 + 30 + 17 = 137 days from January 1 to May 17 in 2022. How'd we get there? Well, January and March each have 31 days, April has 30, and February has 28. We add them together and add the17 of May 17 to get the137 days.
• The same for July 8: There are31 + 28 + 31 + 30 + 31 + 30 + 8 = 189 days from January 1 to July 8 in 2022.
• The difference between these two time differences (189 − 137 = 52 days) is the number of days between May 17 and July 8, 2022.

Different years

If there are one or more years between two dates, we should work out two things:

• For the start date, we need the number of days between itself and December 31 of that year. Here, we must include the end date (so add1 day).
• For the end date, we need the number of days between January 1 of that year and itself (excluding the end date).
• We also need to know how many complete calendar years there are between the two dates.

Example: let's work out the number of days between September 17, 1997, and December 1, 1999.

• September 17, 1997, to December 31, 1997, is105 days, and106 days with the end date included.
• January 1, 1999, to December 1, 1999, is334 days.
• There is one complete calendar year (1998) between our dates, contributing another365 days to the day count.

So, the grand total of number of days between September 17, 1997 and December 1, 1999 is106 + 334 + 365 = 805 days.

And that's it — now you know how to calculate the number of days between any two dates!

If thenumber of days calculator didn't help you count the days, then perhaps you might be interested in our otherday counting calculators:

• Day counter;
• Working days;
• Months between two dates;
• Years between two dates;
• Time between dates; or
• Days between dates.