The Age Calculator tells you your exact age from your date of birth — in years, months, and days, right down to hours and minutes. Enter your birth date to see how old you are today, or set a different target date to find your age on any day.
It also counts down the days until your next birthday, which is useful for planning, forms, and documentation.
How to calculate your age
- Enter your date of birth.
- Optionally set a target date (the default is today).
- Read your exact age in years, months, and days, plus the time until your next birthday.
How age is calculated
Age is the difference between two dates. The calculator counts complete years first, then the remaining months, then the leftover days, accounting for different month lengths and leap years so the result is precise.
Frequently Asked Questions
How do I calculate my exact age?
Subtract your date of birth from today’s date. The calculator breaks the result into years, months, and days so you get your precise age rather than just a number of years.
How many days until my next birthday?
The tool counts the days from today to your next birthday and shows the countdown automatically.
Can I calculate age between two dates?
Yes. Set the target date to any day and the calculator returns your age on that date.
Does it account for leap years?
Yes, the calculation includes leap years and varying month lengths for an accurate result.
Is the age calculator free?
Yes, it is completely free and runs in your browser — your birth date is never uploaded.