About the Age Calculator
Works out an exact age in years, months and days using real calendar lengths rather than assuming every month has 30 days. Also shows totals in weeks, days and hours, the weekday you were born on, and how long until your next birthday.
How the exact age is calculated
The calculator counts whole years first, then whole months, then the days left over, borrowing the real length of the previous month rather than assuming 30 days. That is the same way people count age by hand, so someone born on 31 January is one month old on the last day of February, not on 3 March. Leap years are handled by the calendar itself, so a 29 February birthday works.
Age at a past or future date
Change the "age at date" field to find how old someone was on a particular day - for a form, a visa application or a school intake cut-off - or how old they will be on a date in the future. The totals in weeks, days and hours update with it.
Related calculators
Working out a change between two numbers? Use the percentage calculator. Planning a purchase? The loan calculator shows monthly payments and total interest, and the VAT calculator adds or removes sales tax.
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