Days Between Dates Calculator
Pick a start date and an end date to see the gap in days, weeks, months and years.
Date Range
The two dates are the same — there are 0 days between them.
Calculate the number of days between two dates, or add/subtract days from a date — for deadlines, planning, and scheduling.
Formula
Days between = end date - start date (in milliseconds, converted to days). 1 day = 86,400,000 ms.
Reference Values
- •1 year ≈ 365 days (non-leap)
- •1 week = 7 days
- •Leap years add 1 day every 4 years
FAQ
Common questions about Days Calculator
How we calculate this
We use the standard published formula for this calculation, and we show the working so you can check it.
Spotted a mistake? Tell us and we'll check it within a few days. See how we check our calculators.