Find your exact age in years, months, days, hours, minutes and even seconds — updated in real-time. Also shows your next birthday, the weekday you were born, and life totals.
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How it works
We compute the calendar difference year-by-year to correctly handle leap years and variable month lengths, then use total-millisecond arithmetic for the total-hour and total-second counters.
Key features
- Live updating (every second)
- Years/months/days breakdown
- Total weeks, days, hours, minutes, seconds
- Days until next birthday
- Birth weekday
- Client-side — DOB never leaves your device
Common use cases
Birthday party planning
"Only 42 days to go — I better start planning."
Retirement math
Age precision helps with pension calculations.
Baby milestones
"Our little one is 178 days old today!"
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Pro tips
- ◆Use it live on birthday morning — the seconds counter is oddly satisfying.
Common mistakes to avoid
- ✕Using calendar days for age instead of calendar years+months+days — 500 days ≠ 1.37 years exactly.
Frequently asked questions
Is my birth date sent anywhere?▼
No. Everything is calculated in your browser. We never see it.
What if I know only the year?▼
Set month/day to January 1 — the estimate will be accurate to about 6 months.
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