Age Calculator
Calculate exact age in years, months and days between two dates.
Results are provided for general informational use. Verify important financial, health or legal figures before relying on them.
About this Age Calculator
The Age Calculator compares a date of birth with a chosen target date and breaks the elapsed time into calendar years, months and days. It also shows the total number of elapsed days, which is useful when you need more detail than a simple year count.
For related tasks, try Date Difference Calculator, Day of Year Calculator or Week Number Calculator.
How to use it
- Choose the date of birth.
- Choose the date on which you want to calculate the age.
- Select Calculate and review the calendar age plus total elapsed days.
Practical example
If a person was born on 10 March 2000 and you calculate their age on 10 March 2026, the result is exactly 26 years. Using another day in March will also show the extra months and days where applicable.
Frequently asked questions
Does the calculator use calendar months?
Yes. It calculates calendar years, months and days rather than treating every month as a fixed number of days.
Can I calculate age on a past date?
Yes. Change the target date to any valid date that comes after the date of birth.
Why can total days differ from years multiplied by 365?
Leap years and different month lengths make calendar time longer or shorter than a simple 365-day estimate.
Keep exploring
View category →More Calculators
Date Difference CalculatorFind calendar years, months, days and total days between two dates.Day of Year CalculatorFind a date’s ordinal day number within its year.Week Number CalculatorFind the ISO week number and ISO week-year for a date.Add Days to DateAdd or subtract a number of calendar days from a chosen date.BMI CalculatorEstimate body mass index from height and weight.Business Days CalculatorCount weekdays between two dates while excluding Saturdays and Sundays.