How Old Am I?
Calculate your exact age down to the second — plus fun stats, birthday countdown, and more.
Date Difference Calculator
Calculate the number of days between any two dates.
Frequently Asked Questions
How is age calculated?
Age is calculated by subtracting your birth date from the current date. The calculation accounts for leap years and varying month lengths to give you an exact result in years, months, and days.
What is my age in seconds?
Your age in seconds is the total number of seconds elapsed since your exact birth time. It's constantly ticking — the counter on this page updates every second.
How do you calculate dog years?
The old "1 dog year = 7 human years" is a myth. We use a more accurate formula based on size and life stages: the first year equals ~15 human years, the second adds ~9, and each subsequent year adds ~5 human years.
How many days until my birthday?
Enter your birth date above, and the countdown section shows exactly how many days, hours, minutes, and seconds remain until your next birthday — updated in real time.