Age calculator.
Enter your date of birth and instantly see your exact age in years, months, and days — plus how many days until your next birthday.
Enter your date of birth and the age calculator instantly shows your exact age in years, months, and days. It also counts down to your next birthday and works for any past date.
Your age
total days
total weeks
total months
total hours
Next birthday
Frequently asked questions
How do I calculate my exact age?
Enter your date of birth above. The calculator computes your age in full years, months, and remaining days using calendar math — not a fixed 30-day month approximation.
Does the calculator account for leap years?
Yes. The algorithm counts actual calendar days, so leap years (including February 29 birthdays) are handled correctly.
How is "months" calculated when months have different lengths?
The calculator rolls forward from your birth month to the current month using actual month lengths. For example, if you were born January 31 and today is March 2, you are 1 month and 2 days old (Jan 31 → Feb 28/29 = 1 month, then Feb 28/29 → Mar 2 = 2 days).
Can I calculate someone else's age?
Absolutely — just enter their date of birth. The calculator works for any past date.
How many days until my next birthday?
After entering your birthdate, the calculator shows the number of days remaining until your next birthday.