Age Calculator
Calculate exact age in years, months, and days.
Enter your values to calculate your result.
Formula
Age is calculated using calendar months and days (accounting for different month lengths), not a simple day count divided by 365. Totals (days, weeks, hours, minutes, seconds) are exact elapsed time between the two dates.
Frequently Asked Questions
What happens with a February 29 birthday?
In non-leap years, the next birthday is treated as February 28. In a leap year, it falls on February 29 as usual.
Does this account for time zones?
No — both dates are treated as calendar dates only, independent of time zone, so the result is the same no matter where you are.
How accurate are the sleep and heartbeat estimates?
They're rough estimates based on averages (8 hours of sleep per day, a 75 bpm resting heart rate) — not a measurement of you specifically. Treat them as fun facts, not health data.
Why don't I see a Hijri age?
The Hijri birth date and age only appear when both dates fall within the tabulated Umm al-Qura calendar's supported range (roughly 1883-2077 CE).