Date Difference Calculator

Find the number of days, weeks, months, and years between dates.

Last reviewed
September 2026

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Results update privately in your browser.

Start date

End date

How we calculate

Difference in calendar days; months and years use average calendar lengths.

Your values are calculated locally and are not sent to a server by this calculator.

Results are for informational purposes, not financial, tax, legal, lending, or investment advice.

Common questions

Is this calculator free?

Yes. Calculations run in your browser and no account is required.

Are results exact?

Results follow the stated formula. Round currency outputs appropriately for real-world decisions.