Age Calculator
Calculate your exact age in years, months and days.
How to use this tool
Enter your birth date
Pick your date of birth from the calendar. Optionally set a custom “as of” date.
Hit Calculate
One click — the result appears instantly with a full breakdown.
Explore the stats
Total months, weeks and days lived, the weekday you were born, and your next birthday countdown.
Frequently asked questions
How is the exact age calculated?
We compare your birth date with the reference date using real calendar math — full years first, then remaining months and days. Leap years and varying month lengths are handled automatically.
What if I was born on February 29?
Leap-day birthdays are handled correctly. In non-leap years your next birthday is counted to February 28, and we note it in the result.
Can I calculate age for a past or future date?
Yes — set the “Calculate as of” date to any date. Leave it empty to use today.
Is my birth date stored anywhere?
No. The calculation runs entirely in your browser and your date never leaves your device.
Why does the day count differ from 365 × years?
Because of leap years — every 4th year adds an extra day. The total-days figure counts every real day you have lived.