Date Calculator – Days Between Dates

Days between two dates

Start date End date

Add or subtract days

Start date

Date calculator: how many days between two dates?

Pick a start date and an end date to see instantly how many days are between them, plus the same span in weeks, months and years and the number of weekdays (Monday–Friday). The second calculator adds or subtracts days, weeks, months or years, so you can find the date 30, 90 or 100 days from today or 6 months ago, with the day of the week.

How to use

Days between dates: choose the two dates and the result updates at once. By default the start date is not counted (Oct 1 → Oct 2 = 1 day). Turn on Include the start date to count both ends.
Add or subtract: choose a start date, a number, a unit (days, weeks, months, years) and after/before. The quick buttons fill in common values.
Want to watch the days tick down every day? Save the date as a countdown.

FAQ

What date is 90 days from today?

Leave the start date as today, enter 90, choose days and after. The result shows the exact date and weekday.

What is one month after January 31?

February has no 31st, so the result is moved to the last day of the month (February 28, or 29 in a leap year).

Are public holidays excluded from weekdays?

No. Weekdays count Monday to Friday only; public holidays differ by country and year and are not removed.