Age Calculator
Exact age in years, months and days
100% Private & In-Browser
Processed locally using client-side JavaScript. Your files and data never touch any server.
Instant & Unlimited
No registration, no waiting queues, and no limits on file conversions or generations.
What is Age Calculator?
The Age Calculator converts a date of birth into an exact age in years, months, and days — the calendar-correct way, accounting for leap years and unequal month lengths. It can also find the age at any past or future date, not just today.
How to use Age Calculator
Enter the date of birth.
Optionally set a target date — defaults to today.
The tool computes the exact elapsed time in years, months, and days using calendar arithmetic.
Read the result, plus total days lived for good measure.
- Calendar-exact calculation across leap years and 28-to-31-day months
- Age at any target date, past or future — not just today
- Total-days figure included for contracts and records
- Instant and private — dates are processed on your device only
- Filling in official forms that require age in years, months, and days.
- Checking a child's exact age for pediatric milestones or school cutoffs.
- Counting down to a milestone birthday or anniversary.
Frequently Asked Questions
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