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Age Calculator
Find your exact age in years, months, days, weeks, and total hours from any date, with a next birthday countdown.
Select your date of birth to calculate your exact age.
Privacy Note
All calculations run locally in your browser. No data is sent to any server.
Frequently Asked Questions
Enter your date of birth and the calculator instantly shows your exact age in years, months, and days as of today (or any target date you choose). It correctly handles leap years, different month lengths, and birthday timing.
Yes. The "Age on Date" field defaults to today but you can change it to any past or future date to calculate the difference between any two dates.
The total days are calculated as the exact number of milliseconds between the two dates divided by the number of milliseconds in a day, floored to the nearest whole number.
If you were born on February 29 (a leap day), the calculator handles it correctly. On non-leap years, your birthday is treated as February 28 for next-birthday calculations.
Yes. Your dates are processed locally in your browser. Nothing is stored or sent to any server.
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