Free Age Calculator
Calculate your exact age in years, months, days, hours — plus fun facts about your life so far.
Your age snapshot
100% client-side. Your dates stay in your browser.
Your age snapshot
Live totals and birthday milestones based on your selected dates.
Fun extras
Friendly estimates based on common averages — just for fun.
Current age year progress
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Frequently Asked Questions
How is age calculated exactly?
This calculator compares your birth date with the chosen reference date and uses real calendar month lengths, leap years, and exact day counts.
What zodiac sign am I?
Your Western zodiac sign is based on your birth month and day. The calculator also shows your Chinese zodiac animal from your birth year.
How accurate is the calculation?
The age result is calendar-accurate for years, months, days, and leap-year handling. Fun extras like heartbeats and sleep are approximate estimates.
Can I calculate age between two dates?
Yes. Enter the birth date as the start and change the “Calculate as of” field to any date you want to compare against.
Is my birthdate stored?
No. Everything runs locally in your browser. No dates are uploaded, saved, or shared unless you copy the summary yourself.
How are leap years and February 29 birthdays handled?
Leap years are handled automatically. If you were born on February 29, the tool treats February 28 as the anniversary date in non-leap years when needed.