Age
Calculator.
Punch in your date of birth — get your exact age, total days and hours lived, the weekday you were born on, and a countdown to your next birthday. Switch modes to compute against a specific date or reverse the math to find a DOB from an age.
Frequently asked questions
What does Age Calculator do?
Years, months, weeks, days, hours and seconds since DOB. The whole thing runs in your browser tab, so it is ready the moment the page finishes loading.
Is Age Calculator free to use?
Yes. Age Calculator is completely free on ToolMunch — no trial, no premium tier holding back the main feature, and no daily or hourly cap on how many times you can use it.
Do I need to create an account or sign up?
No. There is no account, no email address, and no login. Open Age Calculator, do the job, and take the result — nothing is gated behind a signup form.
Are the numbers I enter sent to a server?
No. Age Calculator runs entirely inside your browser tab, so what you type never leaves your own device. Nothing is uploaded, which means there is no copy of it on a server to worry about.
Does Age Calculator work on Mac, Windows, and phones?
Yes. Age Calculator runs in any modern web browser on Windows, macOS, Linux, Chromebook, Android, and iOS. There is nothing to download or install.
Can I use it as many times as I want?
Yes. There is no queue, no per-hour quota, and no counter that runs out — run Age Calculator as often as the work needs.