Age Calculator
Find your exact age in years, months, and days from your date of birth. It also shows your age as a total number of days, weeks, and months.
About Age Calculator
Enter your date of birth and this calculator works out how old you are down to the day. By default it measures up to today, but you can set any date to find your age on a past or future day.
It is handy for forms, birthdays, milestones, and quick trivia like how many days you have been alive.
How to Use
- Enter your date of birth.
- Leave the second date as today, or set a different date.
- Read your exact age, plus totals in days, weeks, and months.
Frequently Asked Questions
How is the age calculated?
The tool counts whole years, then the leftover months, then the leftover days, handling months of different lengths so the result is accurate.
Can I find my age on a specific date?
Yes. Change the second date to any day and the calculator shows your age as of that date.
Is my date of birth private?
Yes. The calculation runs in your browser and nothing is uploaded.
About Matt George
I'm Matt George, a software engineer in the startup space. I run my own shop building software for early-stage founders, and I love making free tools and experiences that people actually use. Enjoy using Age Calculator!