Age calculator
Enter your date of birth to see your exact age in years, months, and days, along with the totals in months, weeks, and days.
How age is worked out
The tool subtracts your birth date from the chosen date, borrowing days and months where needed so the result is a true years, months, and days figure. The totals simply re-express the same gap as one running count.
FAQs about age
How is exact age calculated?
The tool counts full years from your date of birth to the chosen date, then the leftover months, then the remaining days. This gives an accurate age rather than a rounded figure.
Can I find my age on a future date?
Yes. Change the "age on" date to any past or future day and the result updates to show how old you are, or will be, on that exact date.
Does it account for leap years?
Yes. Because it works directly with calendar dates, February 29 and varying month lengths are handled correctly without any manual adjustment.
What are total months and days for?
They restate your age as a single running count, which is handy for forms, eligibility checks, or simply seeing how many days you have lived.
Why is the day count sometimes a day off elsewhere?
Different tools decide whether to include the start or end date. This tool counts whole elapsed days from birth, which matches the common way of stating age.