Free tool · 📅 Age & date calculator
Dates, donewithout counting on fingers.
Age for a form, days to a deadline, notice-period end date, SLA calendar vs working days, contract renewal — the date arithmetic people search for every day.
Calendar arithmetic uses your browser’s local date; months are calendar months (31 Jan + 1 month = 28/29 Feb).
What it checks
Everything we would look at first on a client call.
Free, no sign-up, no email gate. If the report shows red, the fix is written next to it — and we are one click away if you would rather we did it.
- Exact age with next-birthday countdown and day of week born
- Days / weeks / months between dates
- Add or subtract days, weeks, months, years
- Working days excluding weekends (add your holidays)
FAQ
Common questions
Why does my age differ by a day on other sites?
Time zones and whether the end date is counted inclusively. We count completed days as of the end date in your local time.
Can I add Indian public holidays?
Paste holiday dates (one per line) in the working-days mode — they are excluded.