A date math tool

How many days between?

Total days

31

days

1 month, 0 days

Roughly 4 weeks. 21 working days.

Other units

4w 3d

weeks

21

business days

1

months (approx)

0.08

years (decimal)

744

hours

44,640

minutes

Two dates

Pick a start, pick an end.

Years and months are calendar units — May 15 to May 14 of the following year is "0 years, 11 months, 30 days", not "1 year". Business days exclude weekends but not country- specific public holidays.

Date math, two directions

You have two dates. Or you have one.

This tool computes the gap between two dates. Need the inverse — add or subtract days, weeks, or months from a single date? Use the date calculator. Want to time something running right now? Stopwatch.