Age Calculator
Exact age in years, months and days from your birth date.
🔒 100% browser-based — your data never leaves your device.
About this tool
Enter a birth date and get the exact age today: full years, remaining months and days, plus the total number of days lived and a countdown to the next birthday. Useful for forms that require age on a specific date, checking eligibility thresholds, or plain curiosity.
The calculation uses real calendar months and leap years — not a 365-day approximation — so the result matches how age is legally counted.
Frequently asked questions
How is the age in months and days computed?
The calculator counts full years first, then full calendar months, then remaining days, exactly the way ages are stated on official documents.
Does it handle leap years?
Yes. Calendar arithmetic is used throughout, so February 29 birthdays and leap years are handled correctly.
Can I calculate age at a date other than today?
Yes — change the second date to any reference date, past or future.