Age Calculator

Key takeaway: This calculator tells you exact age in years, months, and days. Good for forms, school cut-off dates, work paperwork, birthdays, and all the random admin that wants an exact number.

Enter a date of birth and, if needed, a comparison date. The result shows exact age plus total months, weeks, and days.

Date of birth

Age on this date

What this age calculator does

It works out the gap between two dates and breaks it into something normal people can read. Years, months, and days for the exact age. Then total months, weeks, and days for the admin version.

Where it helps

School and childcare: checking cut-off dates and enrolment ages.
Work and HR: age-based forms, junior pay checks, and compliance paperwork.
Government and medical forms: when a rough age is not enough.
Birthdays and milestones: if you want the exact number, not a guess.

The catch

Age sounds simple until you need it exact. Leap years, month lengths, and whether the birthday has already happened this year all change the answer. That is why manual counting goes wrong more often than people expect.

Example

If someone was born on 14 March 2010 and you check their age on 10 June 2026, they are 16 years, 2 months, and 27 days old. That is the sort of detail schools, insurers, and forms sometimes want.

Worth checking before you decide

If you are using this for an official rule, always confirm the exact policy date. Some systems care about age on application date, some on start date, and some on 30 June or another fixed cut-off.