Age Calculator
Work out exact age in years, months and days — plus total days and the next birthday.
To calculate age, enter a date of birth and optionally a reference date. The result gives exact years, months and days, using real calendar month lengths rather than a 30-day approximation, plus totals in weeks, days and hours and a countdown to the next birthday.
Runs in your browser- Privacy
- Runs entirely in your browser — nothing is uploaded
- Cost
- Free, unlimited, no sign-up
Frequently asked questions
How is age calculated across a leap day?
Why does my age differ by a day in some tools?
How to use the age calculator
- 1Enter or paste your date of birth.
- 2Enter or paste your age on this date.
- 3The result appears immediately — copy or download it.
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Put the working age calculator on your own site. It runs in your visitors' browsers exactly as it does here — free, no account, nothing uploaded.
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