Age Calculator
Calculate exact age in years, months, days — plus total weeks, hours and minutes. Runs live in your browser.
What is the Age Calculator?
The Age Calculator computes the exact age between two dates down to years, months, days, hours and minutes. Enter a birth date (or any start date) and optionally an end date, and the tool returns a breakdown along with the total lived in days, weeks, hours and heartbeats.
It is handy for anything that depends on precise age: filling out forms, calculating eligibility for a scheme, planning milestone birthdays or working out the age gap between two people.
The calculation runs entirely on your device — private dates like birthdays or death anniversaries never travel to a server.
How to use the Age Calculator
- 1Enter the birth date (day / month / year).
- 2Optionally enter a target date — the default is today.
- 3Read the breakdown in years, months and days.
- 4Scroll for extras: total days, hours, weeks and next birthday countdown.
- 5Adjust either date to see the impact.
Key features
- Precise year/month/day breakdown
- Total days, weeks, hours, minutes
- Next birthday countdown
- Age-difference mode for two dates
- Handles leap years correctly
- Runs offline
Examples
Age today
Born 15 Aug 1998, today: 27 years, 5 months, 6 days — with an exact hour count.
Eligibility check
Verify whether a candidate is under 25 on a specific selection date.
Why use this tool
- Precise down to minutes
- Handles leap years and month lengths
- Useful for forms, contests, insurance
- Free and private
- Works on mobile
Common use cases
- Filling age-restricted forms
- Planning birthday surprises
- Verifying eligibility for schemes
- Calculating time since an anniversary
- Working out age gaps between siblings
Frequently asked questions
How is age counted?
By full calendar years, then remaining months and days — the same convention official forms use.
Does it handle leap years?
Yes — Feb 29 is handled correctly across leap and non-leap years.
Can I compare two people’s ages?
Yes — enter two dates to see the difference.
Is my birthday uploaded?
No — the tool runs entirely in your browser.
What about time zones?
The calculator uses your local time zone. Small differences of a few hours may appear when travelling.