Age Calculator
Find your exact age in years, months and days, or the days until your next birthday, with this free online age calculator in your browser.
Enter details
Result
Enter the details to see your result.
Runs in your browser. Your inputs are not saved or transmitted.
How to use this calculator
- Enter your date of birth.
- Optionally set an 'age at' date (defaults to today).
- Read your age in years, months and days plus totals.
How it works
Calendar age counts whole years, then remaining months, then days, handling different month lengths and leap years. Totals are exact day counts.
Worked example
Born 2000-01-15. On 2026-06-21 that's 26 years, 5 months, 6 days.
Tips
- Runs entirely in your browser. Your inputs are not saved or transmitted.
Frequently asked questions
Does it handle leap years?
Yes — it uses exact calendar dates, so 29 February and leap years are counted correctly.
Do my dates upload anywhere?
Runs entirely in your browser. Your inputs are not saved or transmitted.
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Explore more in Time, Date, Roster & FIFO.
Cite this tool
Zerdly. (2026). Age Calculator. Retrieved from https://www.zerdly.com/tools/age-calculator/
Tip: Enter any known values to calculate the remaining results.
All calculations run in your browser. Your inputs are never saved or transmitted.