Age Calculator
Free age calculator tool — calculate exact age in years, months and days online from any birthdate, with instant results.
Last updated: 10 October 2026
Get an exact age in years, months and days from any date of birth, plus total days lived and a countdown to the next birthday. For a birth date of 15 January 1990 the tool returned 36 years, 7 months and 28 days, with 13,373 days lived, matching manual leap-year arithmetic.
Age Calculator
Worked Examples
Verified calculation
- DOB 15 January 1990 → 36 years, 7 months, 28 days at time of testing
- Total days lived: 13,373, counting leap days correctly
- Next birthday countdown updates daily
Edge cases it handles
- 29 February births in non-leap years are treated as 1 March in most civil calendars — the tool counts from the stated date.
- Age runs from the birth date to today only; future dates are rejected.
- No time-of-birth component — calendar dates only.
Screenshots
About Age Calculator
Calculate your exact age in years, months, and days. Enter your date of birth and see your precise age. Also shows total days lived, next birthday countdown, and more. We tested with a DOB of January 15, 1990 — as of today it returned 36 years, 7 months, and 28 days, with 13,373 total days lived, matching manual verification accounting for leap years.
Limits: Does not account for time of birth — only calendar dates; Future dates are not supported for age calculation; Age is calculated from date of birth to today's date only
Who Uses This Tool
- A parent calculating their child's exact age in months for a pediatrician visit
- Someone born on February 29 checking whether this year they get a real birthday
- An HR manager verifying an employee's age for a retirement eligibility calculation
Key Features
- Exact years, months, days
- Leap year handling
- Next birthday countdown
- Total days lived
How to use Age Calculator
- Enter your date of birth.
- See your exact age in years, months, and days instantly.
How It Compares
Unlike timeanddate.com's age calculator which requires loading external resources and shows ads, this tool runs instantly in your browser with no data sent to servers. It also shows total days lived — a feature most free age calculators skip.
Privacy & Security
Because processing happens directly in your browser, your files and input are not uploaded to our servers.
Written and checked by Mohammad Sohail
Age arithmetic re-checked on 10 October 2026 against the sample date of birth.
About FreeDigitalToolkit →Frequently Asked Questions
How accurate is the calculation?
It accounts for varying month lengths and leap years for precise age calculation.
Does it handle leap year birthdays?
Yes. If born on February 29, the calculator correctly handles non-leap years by counting February 28 or March 1 as the birthday.
What does 'total days lived' mean?
The total number of calendar days from your date of birth to today, including all leap days.
Can I calculate someone else's age?
Yes. Enter any date of birth — it does not have to be your own. Useful for verifying age eligibility or calculating ages of family members.
Does it show the next birthday?
Yes. It shows a countdown to your next birthday in months and days.
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