Find out your exact age down to the day. Enter your date of birth and instantly see your age in years, months, and days — plus fun extras like the day of the week you were born on, your total days alive, and a countdown to your next birthday.
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Tip: leave “Calculate age at” empty to use today, or pick any past/future date — e.g. how old you’ll be on a milestone.
How to use the Age Calculator
- Enter your date of birth using the date picker.
- Optionally change "Calculate age at" to any date — leave it empty to use today.
- Click Calculate Age to see your exact age plus totals and your next-birthday countdown.
Frequently asked questions
How is age calculated exactly?
Full calendar years are counted first, then remaining months, then remaining days — the same way official documents compute age. Leap years are handled automatically.
Can I calculate someone's age on a future date?
Yes. Set "Calculate age at" to any future date to see how old you or anyone will be on that day — handy for milestones and anniversaries.
Is my birth date stored anywhere?
No. The calculation runs entirely in your browser; your date of birth never leaves your device.