Calculators
Age Calculator
Calculate your exact age in years, months, days, hours, and minutes.
Enter a valid date of birth and reference date.
How it works
- 1Pick your date of birth.
- 2Optionally change the reference date to compute age at any moment.
- 3See age broken down by years / months / days, plus the days until your next birthday.
Use cases
- Quick "how old am I" checks for forms or applications
- Plan ahead for upcoming birthdays and anniversaries
- Compute someone's age as of a specific date
Frequently asked questions
How is age calculated?
Calendar-aware: years, months, and days are derived from the actual difference between the two dates, not a simple 365.25-days approximation.
Does it handle leap years?
Yes — the calculation uses JavaScript date math, which knows about leap days and varying month lengths.
Is my date saved?
No. The calculation runs locally in your browser. Nothing is sent to a server.
Read the guide
How to calculate exact age from a date of birth
Calendar-accurate age math is harder than "today minus birthday." Here is what the calculator does and how to use it for "age on a given date" questions.