Everyday
Age Calculator
Find your exact age in years, months and days — plus days until your next birthday.
Age Calculator
How to calculate your age
Enter your date of birth and, optionally, a different date to measure your age as of that day. The calculator gives your age in full years, months and days, along with totals and a birthday countdown.
Why the month and day matter
A simple year subtraction can be off by one near your birthday. This tool accounts for the exact month and day, so the result is correct whether your birthday has passed this year or not.
Frequently asked questions
How do I calculate my exact age?
Enter your date of birth. The calculator subtracts it from today (or a date you choose) and expresses the result in years, months and days, adjusting for the exact birthday.
How many days old am I?
The “total days” figure shows exactly how many days you have lived since your date of birth, including leap days.
Can I calculate age on a past or future date?
Yes. Change the “age at date” field to any date to see how old you were, or will be, on that day.
Does it handle leap years?
Yes, total days include leap days. People born on 29 February are handled gracefully by rolling to 1 March in non-leap years.