Age Calculator
🔒 In your browserExact age in years, months & days, plus next birthday.
How it works
Work out an exact age in years, months and days from a date of birth — useful for forms, exam eligibility and birthdays. It also shows the total in months, weeks and days, and how long until the next birthday.
🔒 Calculated entirely in your browser — nothing is uploaded.
🔒 Calculated in your browser: your marks, grades and dates are never uploaded. Grading rules and conversion formulas vary by board and university, so treat the result as a reliable estimate and confirm anything official with your institution.
About the Age Calculator
This free age calculator finds your exact age in years, months and days from a date of birth — useful for forms, exam and job eligibility, and birthdays. It also shows your age in total months, weeks and days, and counts down to your next birthday.
Dates are handled in your browser, so nothing is uploaded.
How it works
Enter your date of birth and, optionally, a date to calculate the age at (it defaults to today). The calculator counts the full years, then the remaining months, then the remaining days — carrying over correctly across months of different lengths and leap years, so the result is exact rather than an approximation.
Why exact age isn't just a subtraction
Subtracting birth year from the current year only gives a rough age and is often off by a year, because it ignores whether your birthday has passed. True age counts complete years first, then borrows across month boundaries for the leftover months and days — and because months are 28 to 31 days long and February gains a day in leap years, that borrowing has to respect the real calendar. This calculator does that carrying for you, which is why exam and job eligibility checks that hinge on a cut-off date come out right.
Frequently asked questions
How is exact age calculated?
It counts complete years from your birth date to the target date, then the leftover months, then the leftover days — adjusting for varying month lengths and leap years so the years/months/days are precise.
Can I find my age on a specific date?
Yes. Set the second date to any date — a future exam day or a past deadline — and the calculator gives your age on that date, which is handy for checking eligibility cut-offs.
Does it handle leap years?
Yes. The day and month counts account for leap years, so ages spanning 29 February are correct.
How many days or weeks old am I?
Alongside years, months and days, the calculator shows your age as total months, total weeks and total days, and counts down the days to your next birthday.
Is my date of birth uploaded?
No. The calculation runs entirely in your browser.