Age Calculator
Find your exact age in years, months and days, and see how long until your next birthday.
Your privacy is safe, this tool runs entirely in your browser. Nothing you enter is uploaded to or stored on our servers.
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How to use Age Calculator
- 1Select your date of birth.
- 2Optionally change the “age at” date, it defaults to today.
- 3Click “Calculate Age”.
- 4See your exact age in years, months and days, plus totals and your next birthday.
About the Age Calculator
This free age calculator tells you exactly how old you are, down to the day. Just enter your date of birth and it instantly works out your age in years, months and days, along with your total months, weeks and days lived.
It is handy for filling in forms, checking eligibility, planning birthdays, or simply satisfying your curiosity. All calculations run in your browser, so your information stays private.
Frequently asked questions
How do I calculate my age from my date of birth?
Select your date of birth above and click “Calculate Age”. The tool instantly shows your exact age in years, months and days, plus your total days lived and your next birthday.
How is my exact age calculated?
We compare your date of birth to the target date and work out the complete years, months and days between them, accounting for different month lengths and leap years.
Does the age calculator account for leap years?
Yes. Leap years and the different number of days in each month are fully handled, so your age in days is accurate.
How can I find my age in total days or months?
Along with years/months/days, the tool shows your age expressed entirely in days, weeks and months, useful for birthdays, milestones and official forms.
Can I calculate age on a future or past date?
Yes. Change the “age at” date to any date to find how old you (or anyone) were or will be at that point in time.
Is my date of birth stored anywhere?
No. The calculation happens locally in your browser and nothing is saved or uploaded. It is completely free with no sign-up.