Age Calculator

Find your exact age in years, months, and days from any date of birth — plus how many total days you've lived and how long until your next birthday.

Date of birth As of

How age is calculated

Your age in years is the number of complete years between your birth date and today — you turn a year older only once your birthday has actually passed this year. This calculator works out the full breakdown: complete years, then the leftover months, then the leftover days, accounting for the different lengths of each month and for leap years. That's why it's more accurate than simply subtracting years.

What you can find here

Exact age in years, months, and days.
Total days lived — a fun, surprisingly large number.
Days until your next birthday, so you can start the countdown.
Age on any date — set the "as of" field to a past or future date to find age at that moment.

Common uses

Fill in forms that ask for exact age, check eligibility by a specific date, plan a milestone birthday, or just satisfy curiosity about how many days you've been around. Because you can set the "as of" date, it also answers "how old will I be on…" or "how old was I when…".

Private and instant

Your date of birth never leaves your device — the calculation runs entirely in your browser. Nothing is uploaded or stored.

Frequently asked questions

How do I calculate my exact age?

Enter your date of birth and today's date. The calculator counts complete years, then the remaining months and days, adjusting for month lengths and leap years.

Can I find my age on a future or past date?

Yes — change the 'As of' date to any date and it will show your age at that moment, or your age at a past date.

Is my date of birth kept private?

Completely. The calculation happens in your browser and your information is never uploaded.