How to use it
Enter a date of birth. The "age on" date defaults to today, but you can change it to find someone's age on a past or future date — handy for applications, eligibility rules and school enrollment cutoffs.
Fun facts it shows
Total months, weeks and days lived, the weekday you were born, and which day of the week your next birthday falls on.
Frequently asked questions
How is age calculated for Feb 29 birthdays?
In non-leap years the birthday is treated as March 1 for the countdown, and the age turns over on March 1.
Is my birth date stored?
No. Everything is calculated in your browser.
Can I calculate the age of a pet or a company?
Yes — any start date works.