Age Calculator
Exact age in years, months and days — plus next birthday.
About this tool
The Age Calculator gives your exact age in years, months and days from your date of birth, plus totals in months, weeks and days, and a countdown to your next birthday. It handles leap years and varying month lengths correctly.
Beyond birthdays, it's handy for calculating tenure at a job, the age of a document or domain, time since a milestone, or eligibility ages for applications and benefits.
Frequently asked questions
Calendar months, not 30-day blocks. Born January 31? You turn one month old on the last day of February, matching how people actually reckon ages.
Yes — calculations use real calendar dates, so February 29 birthdays and leap-year day counts are exact.
No. The calculation runs in your browser and nothing is transmitted or saved.