Age Calculator
Find your exact age in years, months, and days — instantly, for any date, past or future.
How to use this age calculator
1. Enter your date of birth
Select your correct date of birth using the date picker. Accurate input is essential for a precise result.
2. Choose a target date (optional)
By default, the tool uses today's date. Selecting a different date lets you calculate age for a past or future event.
3. View your exact age
Click Calculate to instantly see your age in years, months, and days.
What is age calculation?
Age calculation measures the time between a person's date of birth and another selected date. Because calendar months vary in length, an accurate age calculator accounts for real date differences rather than simple subtraction.
How leap years affect your age calculation
Leap years add an extra day to February every four years. This age calculator factors that in automatically, so your result stays accurate no matter which years are involved.
For more background on how age is measured, see this overview of age on Wikipedia.
Why use an online age calculator?
Manually counting years, months, and days between two dates is easy to get wrong, especially across leap years or uneven month lengths. An online age calculator removes that risk and gives you an instant, accurate result.
Common uses for this age calculator
People use this tool to check their current age instantly, work out their age on a specific future date, calculate the total number of days they've lived, or confirm age details for forms, applications, and official documentation.
Age calculator: frequently asked questions
How does an age calculator work?
It compares your date of birth with a selected target date and calculates the difference using calendar-based logic, accounting for varying month lengths and leap years.
Can I calculate my age for a future date?
Yes. Selecting a future date shows exactly how old you will be on that day, useful for planning events or milestones in advance.
Does this age calculator account for leap years?
Yes, leap years are factored in automatically, so your result stays precise regardless of which years fall within the date range.
Is this age calculator free to use?
Yes, completely free with no sign-up required.