Age Calculator
Find your exact age in years, months and days on any date, with total months, weeks and days lived and a countdown to your next birthday.
Runs in your browser. Nothing is uploaded.
About the Age Calculator
Application forms, insurance quotes, school admissions, sports categories and retirement plans often depend on an exact age on a particular date, not just the year you were born. Counting months and days by hand is easy to get wrong because months have different lengths and leap years add a day.
This calculator works out your age in completed years, months and days on today’s date or any other date you choose. It also shows the total number of months, weeks and days you have lived and how long it is until your next birthday, including the day of the week it falls on. Dates are handled as calendar days, so the result does not shift with your time zone.
How to use the Age Calculator
- 1
Enter your date of birth.
- 2
Leave “Age on” as today, or pick another date, such as an exam or application deadline.
- 3
Read your age in years, months and days, plus the totals and your next birthday.
Examples
Born 1990-05-15, on 2026-10-1836 years, 5 months, 3 days
13,305 days in total
Next birthday: Saturday 2027-05-15 (turning 37, in 209 days)Born 2000-02-29, on 2026-10-1826 years, 7 months, 19 days
9,728 days in total
Next birthday: Sunday 2027-02-28 (turning 27, in 133 days)Good to know
- People born on 29 February are treated as having their birthday on 28 February in common years, which is how many countries count legal age. Some use 1 March instead.
- Months are counted as calendar months from your birthday, so from 31 January to 28 February is one month.
- Total hours are approximate: they assume every day has 24 hours and ignore daylight saving changes.
Frequently asked questions
How is age in years, months and days calculated?
First the completed years since your last birthday, then the completed calendar months since then, then the remaining days. This is the method most official forms use.
Can I calculate the age on a past or future date?
Yes. Change “Age on” to any date after the date of birth, for example the cut-off date for a school year or a job application.
Is my date of birth stored?
No. The calculation runs in your browser and nothing is saved or sent.
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