Age Calculator
Calculate exact age in years, months, days and weeks from any date of birth. Works for past and future dates.
How to Use Age Calculator
01
Enter date of birth
02
Optionally change the "as of" date
03
See exact age breakdown instantly
Why Use This Tool
100% Private
Your data never leaves your browser. Nothing is uploaded to any server.
Instant Results
Modern browser APIs deliver results in milliseconds with no waiting.
Free Forever
No subscriptions, no credits, no paywalls — ever.
Frequently Asked Questions
Does it account for leap years?
Yes — calculations are precise to the day including leap years.
Can I calculate age from a future date?
Yes — enter any date as the "as of" reference.
What units are shown?
Years, months, days, total weeks, total days and next birthday countdown.
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