Age calculator
Enter your date of birth and you see your exact age today, also in months, weeks and days.
Change the second date to find someone's age on a given day, or how old they will be.
How it's calculated
- It counts the whole months from birth to the chosen date. Every 12 months is one year.
- The days left after the last whole month are the days of the age.
- Leap years count with their 366 days.
An example
Someone born on 15 May 1990 was 36 years, 4 months and 28 days old on 13 October 2026.
That is 13,300 days.
Frequently asked questions
How is exact age worked out?
It counts the full years, then the whole months since the last birthday, then the days left over.
What about people born on 29 February?
In years that aren't leap years, this calculator uses 28 February as the birthday. Some laws use 1 March instead.
How many days old am I?
See the “In days” row. It counts every day from your birth to the chosen date, not counting that last day.
Key terms
- Age
- The number of full years since birth.
- Leap year
- A 366-day year with a 29 February. It comes every four years, except some century years.
The same calculation in other countries
United States (English)
United Kingdom
Canada (English)
Ireland
Australia
New Zealand
South Africa
Singapore
India
Hong Kong SAR China
Nigeria
Malaysia
Philippines
Kenya
Tanzania
Ghana
Pakistan
United Arab Emirates
Kuwait
Uganda
Jamaica
Mauritius
Cyprus (English)
RwandaUp-to-date official data
We check the official sources automatically, every day.