Age Calculator
Calculate exact age in years, months, and days from a birthdate.
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Years
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Months
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Days
Total days lived
Day of week born
Next birthday in
About Age Calculator
Enter any birthdate and get your exact age in years, months, and days. Also shows your next birthday countdown and the day of the week you were born. Useful for official forms, medical records, and trivia.
Use Cases
Filling government forms requiring exact age, calculating age for medical records, finding age difference between two people, retirement planning.
How It Works
Calculates the difference between the birthdate and today (or a custom target date) using JavaScript's Date object, accounting for leap years and varying month lengths.
Frequently Asked Questions
Does it account for leap years?
Yes. The calculator correctly handles February 29 birthdays and all leap year edge cases.
Can I calculate the age on a specific date?
Yes. Toggle to "As of date" mode to calculate age on any past or future date.