Date Difference Calculator

Find out exactly how much time is between any two dates — in years, months, days, weeks, and hours.

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Defaults to today.

Frequently Asked Questions

How is the date difference calculated? +

We take the calendar-correct difference between your start and end dates — complete years, months, and days — plus totals in days, weeks, and hours.

What happens if the end date is before the start date? +

You will see an inline error asking you to pick an end date on or after the start date.

Can I use this for project timelines or deadlines? +

Yes. Enter your project start date and a target or deadline date to see exactly how much time is between them.