How your exact age is worked out
The calculator counts the way people do by hand. It first counts the whole months from your date of birth to the “age on” date, then counts the days left over. Twelve months make a year.
For someone born on 15 August 1995, the age on 10 November 2026 is found like this: 15 August 1995 to 15 October 2026 is 374 whole months, which is 31 years and 2 months. From 15 October to 10 November is 26 more days. So the age is 31 years, 2 months and 26 days.
When a month is shorter than your birth date, the month ends on its last day. Someone born on 31 January reaches one month old on 28 February (or 29 February in a leap year), and is 1 month and 1 day old on 1 March.
Checking your age for a job or admission
Government jobs, armed forces entry, university admissions and exams often set a lower and upper age limit. The advert or prospectus says which date your age is measured on, such as the closing date for applications or a fixed date like 1 August. Enter that date in “Age on this date”, not today’s date, because a few days can decide whether you are eligible.
If you have an age relaxation, for example for a reserved category or government service, add those years to the upper limit yourself and compare. Always rely on the rules printed in the official advert.
Born on 29 February?
In years without a 29 February, this calculator treats 28 February as your birthday, so you turn a year older on 28 February. Some countries and organisations use 1 March instead for legal purposes. If an official date matters, check which rule applies to you.
The totals
Total days counts every day from your date of birth up to the “age on” date, not including the last day. Some calculators include the last day, which makes their total one day higher. Total weeks shows whole weeks plus any days left over, and total hours is total days × 24.
“Today” comes from your device’s clock and time zone, so the result is right wherever you are. Your date of birth is never sent to our server.