Age Calculator
Find exact age in years, months and days, as of today.
About this tool
Enter a date of birth and get an exact age in years, months and days, plus the total number of days, weeks and months lived. Calculated as of today in your browser's local time zone, so the result is correct wherever you are without needing to select a timezone yourself. Useful for form-filling, age-restriction checks, or just satisfying curiosity about an exact age.
Fill in the second date to work out someone's age on a particular day, such as the age a child will be on 31 August for school entry, or a person's age on a past date. It also shows the day of the week you were born and how long until your next birthday. People born on 29 February have their birthday counted on 28 February in other years; legally in the UK they turn 18 on 1 March.
- Does it account for leap years?
- Yes — the calculation uses real calendar dates, so leap years and varying month lengths are handled correctly rather than assumed to be 365.25 days a year.