How do I calculate the number of days between two dates?

To calculate days between two dates, subtract the earlier date from the later date. The result is the number of full days between them. Our calculator does this instantly and also converts the span into weeks and months for context.

How many days are in a month on average?

Averaged over a 4-year leap cycle, a month is 30.4375 days (365.25 ÷ 12). For quick estimates, 30 days per month is common, but exact day counts depend on the specific months involved. Our calculator uses exact calendar dates for precision.

Does the date calculator account for leap years?

Yes. The calculator uses real calendar arithmetic, so it correctly includes February 29 in leap years. For example, the days between February 28, 2024 and March 1, 2024 is 2 days because 2024 is a leap year.

How do I add months to a date that does not exist?

When adding months lands on a date that does not exist (like January 31 + 1 month = February 31), calendar arithmetic rolls back to the last valid day of the target month — February 28 or 29. Our calculator follows this standard convention.

How do I count business days instead of calendar days?

This calculator counts all calendar days. To count only business days (Monday–Friday), exclude weekends manually, or subtract 2 days for every full 7-day week in the span. A dedicated business-day calculator that excludes holidays is best for precise working-day counts.

Date Calculator

Free date calculator — find days between dates, or add/subtract days, weeks, months and years from any date.

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