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Age Calculator
Your exact age in years, months and days - plus total days and hours lived, and a countdown to your next birthday. Calculated in your browser. No sign-up, free.
Details
Results
Fill in the fields to see the result.
Runs 100% in your browser Instant results as you type Free, no sign-up
How to calculate your age
Enter the date of birth
Pick it in the date field - that is all that is required.
Optionally change the reference date
By default the age is calculated as of today; set any other date to compute an age at a specific moment.
Read the breakdown
Exact years, months and days, total days and hours lived, and how many days until the next birthday.
Age calculation questions, answered
Is my data sent to a server?
No. The math runs in your browser - dates, weights, salaries and bills never leave your device.
How are months and days counted exactly?
Calendar-accurate: 'months' are whole calendar months, and the day remainder respects each month's real length and leap years - the same way official forms compute age.
What if the birthday is February 29?
Leap-day birthdays are handled with real calendar math; in non-leap years the next birthday countdown targets March 1.
Can I calculate age at a past date?
Yes - set the 'as of' date to anything, like the start date of a job application or a historical event.