Date Calculator

Calculate exact age, the number of days between two dates (or working days), add or subtract days from a date, and count down to any event.

Your files never leave your device

Private: runs in your browser
Free, with no daily limits
No sign-up, no watermark
Works offline once loaded

How to use Date Calculator

1Pick a calculator: age, between dates, add days or countdown.
2Choose your dates.
3Read the answer in years, months, weeks and days.

Why use this date calculator

Exact age with next birthday
Working days (skips weekends)
Add or subtract days, weeks, months
Live countdown

Most online tools upload your file to their server, process it there and then make you pay to remove limits. This one does the work inside your browser tab instead — so it is faster, it is free for us to run, and your document stays with you.

Questions about Date Calculator

Are the start and end dates counted?

By default we count the days between the two dates, not including the end date — the way most calculators do. Tick 'include end date' to count both.

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