Age Calculator
Enter a date of birth and get the exact age — not just the years, but the months, weeks, days and hours as well. It handles leap years properly, which matters more than you'd think for anyone born on 29 February, and it tells you which weekday the next birthday lands on.
How to Use It
- Enter the date of birth.
- Leave the second field as today, or set a different date to work out someone's age at a future event.
- Read the result in whichever unit you need — years and months for a card, days for a milestone, hours if you're going for effect.
10 Wishes That Play on the Number
-
Happy birthday. You've now completed 30 laps of a very large object at extraordinary speed. Impressive.
-
Nineteen thousand days on Earth and you're still improving. Happy birthday.
-
Happy birthday — the number went up, the standards stayed high.
-
Another year on the counter, none of it wasted. Have a great day.
-
Happy birthday. You've been alive for over half a million hours and I've enjoyed most of the ones I was there for.
-
The age is just the receipt. The life is the purchase. Happy birthday.
-
Happy birthday to someone who has aged like something expensive and deliberately.
-
Twelve more months in the bank. Spend them well. Happy birthday.
-
Happy birthday — statistically you've got a lot of good years left, so pace yourself.
-
However many candles it is this year, you've earned every one. Happy birthday.
Uses Beyond Birthdays
Age in exact months is what nurseries, schools and paediatric charts ask for, and "seventeen months" is much more useful than "one and a bit". People also use the tool for retirement dates, insurance forms, visa applications and pension eligibility, all of which care about the precise day. Speech writers use the hours figure because a number that large gets a reaction.
Planning the party? The countdown tells you how long you've got.
Related collections
Questions
How does it handle 29 February?
The calculator treats a leap-day birthday as 28 February in common years for age purposes, and shows the true leap-day anniversary separately.
Is my date of birth stored?
No. The calculation runs in your browser and nothing is sent to us.