Age Calculator
Enter your date of birth (and optionally a date to calculate up to). You’ll get your exact age and a countdown to your next birthday — instantly and privately.
Pick your date of birth to see your age.
About this age calculator
This tool tells you exactly how old you are — not just in years, but in months, weeks, days and even hours. It’s useful for filling in forms, checking eligibility, planning birthdays, or simply out of curiosity. Because it uses real calendar dates, it correctly handles leap years and months of different lengths.
How to use it
- Select your date of birth.
- Leave “Age at date” as today, or change it to any past or future date.
- See your exact age and the countdown to your next birthday update instantly.
Frequently asked questions
How is my exact age calculated?
We compare your date of birth to today (or a date you choose) and break the difference into full years, months and days.
Can I calculate age on a past or future date?
Yes. Change the “Age at date” field to any date to see how old someone was, or will be, then.
Does it account for leap years?
Yes. The calculation uses real calendar dates, so leap years and different month lengths are handled correctly.
Is my data private?
Completely. The calculator runs in your browser — no dates are sent anywhere.
Related tools
Try the Date Difference Calculator or browse all tools →