Age Calculator
Calculate your exact age from your date of birth — years, days lived, and days until your next birthday.
What is this tool?
A free age calculator. Enter your date of birth to see your age in years, days and weeks lived, your next birthday and how many days are left until it.
How to use
- Enter your date of birth.
- Press Calculate age. To check your age on a specific day, change the reference date in Advanced settings.
- Copy the result if you need it elsewhere.
Use cases
- Checking your exact age in days or weeks for fun milestones.
- Counting down to your next birthday.
- Verifying age on a specific reference date for forms.
Notes
- The Japanese version of this page also shows the Japanese era name and zodiac sign; those Japan-specific details are not shown here.
- All calculations happen locally in your browser.
FAQ
Can I check my age at a specific date?
Yes. Open Advanced settings and change the reference date to see your age on any given day.
Does it handle leap years?
Yes. Day counts and birthdays are computed on calendar dates, so February 29 birthdays and leap years are handled correctly.
Is my birth date uploaded?
No. All calculations run locally in your browser.
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