How to use
- Enter your date of birth using the date picker.
- Your exact age in years, months, and days appears instantly.
- Scroll down to also see your age expressed as a total number of days, weeks, and months.
About this tool
Your legal age in the UK is determined by the number of complete years since your date of birth — you legally turn a new year on the anniversary of your birthday. However, exact age in years, months, and days is sometimes needed for more precise purposes: checking state pension eligibility, calculating interest accrual over a precise period, verifying age for age-restricted products, or completing medical and insurance forms. This calculator gives you your age broken down into years, months, and remaining days as of today, and also expresses your age entirely in days, weeks, and months for contexts where that is more useful.