Age Calculator
Enter your date of birth and get your exact age in years, months, days, hours and minutes — calculated instantly in your browser.
How to use the age calculator
Enter your date of birth
Tap the "Date of birth" field and pick the day, month, and year you were born.
Choose the date to calculate against
The "Age at date" field is set to today by default. Change it if you want to know your age on a specific past or future date.
Press "Calculate age"
Your exact age appears instantly — in years, months, days, and total hours and minutes — along with a countdown to your next birthday.
Why use this age calculator
Precise, not rounded
Calculates real calendar months and days instead of rough estimates, so leap years are always accounted for correctly.
Works for any date
Check age as of today, a past date for records and forms, or a future date for planning ahead.
Private by design
Everything runs locally in your browser. No dates are ever uploaded, logged, or stored.
No sign-up, no cost
No account, download, or payment required. Open the page and use it right away.
Frequently asked questions
How does the Age Calculator work?+
It takes the date you were born and compares it with today's date, or any date you choose, then works out the exact difference in years, months, days, hours, and minutes.
Is this age calculator accurate?+
Yes. It accounts for leap years and the actual number of days in each month, so the result is calendar-accurate rather than an average or estimate.
Can I calculate my age on a future or past date?+
Yes. The "Age at date" field defaults to today, but you can set it to any past or future date to see how old you were, or will be, at that time.
Does ToolInternet store the dates I enter?+
No. The calculation happens entirely in your browser, so your date of birth is never sent to or saved on any server.
Can I find out how many days until my next birthday?+
Yes. Along with your exact age, the result shows the number of days remaining until your next birthday.