Enter a date of birth to get an exact age in years, months and days, along with the total number of months, weeks, days and hours lived. Change the second date to work out how old someone was – or will be – on any day.
The calculation follows the calendar, so it handles leap years and months of different lengths correctly. People born on 29 February have their birthday counted on 28 February in non-leap years.
Questions
How is age calculated?
Full years are counted first, then full months, then the remaining days, using real calendar month lengths.
Can I calculate age at a future date?
Yes. Set the “Age on date” field to any future date.
Is my birth date stored?
No. Everything is calculated in your browser.