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Interactive Age Calculator
MathCalculate exact age in years, months, weeks, days, and seconds.
ttb run age-calculator
Please enter valid dates (Target date must be after DOB).
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How to Use Age Calculator
Enter your date of birth. The calculator instantly shows your exact age in years, months, and days. It also displays your age in total days, weeks, hours, and even seconds. See your next birthday countdown and discover what day of the week you were born on.
1
Enter your parameters
Configure the inputs for the Age Calculator according to your specific needs.
2
View real-time results
The utility instantly processes your request and displays the calculated outputs directly in your browser.
3
Copy or Download
Click the copy icon next to the final output to instantly grab the result, or export it if applicable.
Frequently Asked Questions
Does it account for leap years?+
Yes. All calculations correctly handle leap years, so someone born on February 29th gets accurate age calculations. The tool uses exact calendar arithmetic, not approximations.
What is my age in days?+
Enter your birthdate and the tool shows your exact age in total days lived. Fun fact: most people hit their 10,000th day around age 27, and their 30,000th day around age 82.