How to use the Age Calculator
- Pick your date of birth from the calendar, or type it in.
- Leave "Age on" as today, or choose another date to find your age on a specific day, such as an exam or application deadline.
- Your exact age in years, months and days appears instantly, along with totals in months, weeks, days and hours.
- Check when your next birthday is, which weekday it falls on, and the day of the week you were born.
About this tool
The calculator uses real calendar arithmetic, so leap years and months of different lengths are handled exactly. People born on 29 February have their birthday counted on 28 February in non-leap years. Dates are read in your local time zone, so the result never shifts by a day.
Frequently asked questions
Does it account for leap years?
Yes. The calculation uses real calendar dates rather than approximations, so leap years — including February 29 birthdays — are handled automatically and correctly.
Can I calculate someone else's age?
Of course — enter any past date of birth to find that person's current exact age. Handy for planning surprise parties.
Why would I need age in years, months, and days?
Many official forms, insurance quotes, and medical records ask for precise age rather than just years, and this gives you the exact figure instantly.
Is my birth date stored anywhere?
No. The calculation runs entirely in your browser — your date of birth is never sent to a server or saved anywhere.