Enter a date of birth to get an exact age in years, months and days, plus the number of days and weeks lived and how many days until the next birthday. Change the second date to find someone’s age on a past or future date.
Loading the tool…
How to use it
- Enter the date of birth.
- Leave “Age on” as today, or change it, for example to check age on the day a form is submitted or a policy starts.
How age is counted
Age is counted in whole years from the birthday, then whole months, then the remaining days. Someone born on 15 June 1995 is 31 years, 4 months and 21 days old on 5 November 2026. People born on 29 February usually celebrate on 28 February or 1 March in non-leap years; for legal purposes in England and Wales, the birthday is treated as 1 March.
When exact age matters
- Applications with age limits, such as some scholarships, visas and youth schemes, often set the cut-off on a specific date.
- Insurance and pensions often use age on the policy or claim date.
- Child development milestones and vaccinations use age in months and weeks.
Frequently asked questions
How do I calculate my exact age?
Count full years since your last birthday, then full months, then remaining days. The calculator does this automatically, including leap years.
How many days old am I?
Enter your date of birth; the result shows the total number of days between your birth and the “Age on” date.
Does it handle leap years?
Yes. Dates are counted on the calendar, so 29 February and different month lengths are handled.
Last updated: