Date & time · Difference

Date calculator

Find the number of days between two dates, or add/subtract days from a date.

Mode

Days between
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Rough sheet

step-by-step
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How dates are compared

To find the days between two dates, this calculator counts complete calendar days from the start date to the end date, automatically accounting for varying month lengths and leap years. In add/subtract mode, it moves forward or backward the number of days you specify from your chosen starting date and returns the resulting calendar date.

Frequently asked questions

Yes, switch the direction toggle to subtract days from your chosen starting date instead of adding them.

The difference is the number of full days between the two dates, so June 1 to June 2 counts as one day.