Age Calculator

The Age Calculator works out an exact age from a date of birth — in years, months and days — along with the total number of months, weeks and days lived, and how many days remain until the next birthday.

By default it calculates age as of today, but you can set any 'age at' date to answer questions like how old someone was on a specific date or how old they'll be at a future event. The math uses real calendar months and leap years, not 30-day approximations.

It's useful for filling out forms, checking eligibility ages, planning birthdays or simply satisfying curiosity — and it all runs privately in your browser.