Age Calculator
Calculate exact age from a date of birth in years, months and days. See your next birthday, total days lived and more - all in your browser.
How to use
- 1
Pick your date of birth.
- 2
Optionally set a second date to compare against.
- 3
Read your age breakdown and next birthday.
How it works
Age is computed with calendar-based arithmetic on the date components, which correctly handles differing month lengths and leap years. Total days is the real number of 24-hour periods between the two dates.
Frequently asked questions
How is my age calculated?
Years are compared first, then months, then days - the same way ages are stated in everyday life. Month lengths are handled exactly.
What day does the tool consider "today"?
Your device's current date. The reference date can also be changed manually.
Is any information stored?
No - the calculation happens only in your browser.
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