How do I calculate the difference between two dates?

Enter your start date and end date in the fields above and click Calculate Difference. The tool instantly shows the exact difference in years, months, days, total hours, minutes and weekdays.

Can I calculate future date differences?

Yes. Enter any two dates — past, present or future — and the calculator will compute the exact difference between them in multiple units.

Is the date difference calculator free?

Yes, the Date Difference Calculator on Instant Age Calculator is completely free with no registration required.

Services → Date Difference

Date Difference Calculator

Calculate the Exact Difference Between Any Two Dates.

Date Difference

Enter Two Dates to Find the Exact Difference

Start Date

End Date

Pro Tip

Use this to Calculate Anniversary Durations, Project Timelines, or Days between events.

How It Works

Enter Any Two Dates — Past, Present, or Future — and Get the Exact Difference in Multiple Units.