Age Calculator - Find Your Exact Age Online
Defaults to today. Change it to find your age on another date.
How to use this calculator?
1. Enter your date of birth
2. Keep today's date or pick another reference date
3. Read your exact age, your totals in months, weeks and days, and the countdown to your next birthday
Quick answer
How do you calculate your exact age?
Subtract your birth year from the current year, then take away 1 if your birthday has not happened yet this year. Next, count the months since your last birthday, then the remaining days. Example: someone born on 15 March 1990 is, on 16 October 2026, 36 years, 7 months and 1 day old, because their March birthday has already passed.
About the Age Calculator
What is it?
The age calculator gives your exact age from your date of birth in completed years, months and days. It also shows your total age in months, weeks and days, the day of the week you were born and how many days are left until your next birthday.
Why use it?
Working out an age by hand is error-prone: months have different lengths and leap years add an extra day. A precise age is handy for paperwork, for checking an age requirement on a given date, or simply out of curiosity.
How does it work?
The tool first counts the whole months elapsed since birth, then the remaining days up to the reference date. Years = whole months ÷ 12 (integer part), months = the remainder. The total in days is the exact gap between both dates, leap years included, and the total in weeks is days ÷ 7.
Usage tips
- Change the reference date to find someone's age on a specific past or future date
- For people born on February 29, the birthday is counted on February 28 in non-leap years
- When the birth day does not exist in a month (for example the 31st), that month is counted as completed on its last day
- Everything is calculated in your browser: your date of birth is not sent anywhere
Embed this tool on your website
Copy this code into your website or blog: the tool shows up right on your page, free and without sign-up.