Calculators
Age calculator
Enter a date of birth and see the exact age in years, months and days, plus the total days between that date and today. Everything is calculated in your browser.
Runs locally in your browser
How it works
The calculator subtracts the calendar dates rather than the raw timestamps, so a birthday at 11pm does not lose a day. It walks year by year, then month by month, then counts the remaining days — the same method that handles February in a leap year correctly. The total-days figure counts whole days between the two dates, ignoring the time of day.
Worked example
Born 5 March 2000, checked on 28 October 2026: 26 years, 7 months and 23 days — about 9,733 days in total. The year count only increases once the anniversary has passed, so it stays 26 for the whole month of March until the 5th.
Questions and answers
Everything runs in your browser: your text, file or value is never uploaded anywhere.