How old are you exactly?
Enter your date of birth and get your precise age — down to the second. Free, instant, no sign-up.
How to use this age calculator
Enter your date of birth in the first field. The "Age as of" field defaults to today — leave it to get your current age, or change it to calculate your age on any past or future date. Switch to "Between two dates" to find the exact duration between any two dates.
How is age calculated?
Age is the difference between two calendar dates measured in completed years, months, and days. This calculator uses the Gregorian calendar and correctly handles leap years, so people born on February 29th always get an accurate result.
In some cultures, such as traditional Korean age reckoning, a person is considered one year old at birth and gains a year on New Year's Day rather than their birthday. This calculator uses the standard Western method used globally.
Why does exact age matter?
Legal thresholds like voting age, driving age, and retirement age are often measured to the exact day. Doctors use age in months for young children. If you've ever wondered how many days old you are — or exactly how long until your next birthday — this tool gives you the precise answer instantly.