Free Developer Tool
Find out exact ages down to the day or calculate time until your next milestone event.
Your Date of Birth
Select your date of birth to calculate your exact age and more.
Pick your date of birth above to see your exact age, total days, weeks, and next birthday.
How It Works
Select the day, month, and year you were born using the date picker.
By default it calculates to today. Change the target date to calculate age at a specific point in the future or past.
Your age is shown in years, months, and days — plus bonus breakdowns in weeks, hours, and days until your next birthday.
Great for checking age eligibility, planning birthday content, or satisfying curiosity about how old you really are in weeks.
FAQ
Simply subtracting years misses the months and days. If today is February 1st and your birthday is March 15th, you haven't had your birthday yet — so you're still a year younger than a simple year subtraction would suggest.
Yes — just change the "Calculate to" date. Useful for checking whether someone was of legal age at a specific event, or calculating a child's age at a future milestone.
Leap years are accounted for automatically. February 29 birthdays are calculated to February 28 or March 1 in non-leap years, depending on the convention — this tool uses February 28 as the birthday equivalent.