Age Calculator

Age Calculator

The Age Calculator can determine the age or interval between two dates. The calculated age will be displayed in years, months, weeks, days, hours, minutes, and seconds.

Age Calculator
Birth Date*:

Calculate your age**

Age

* The year here is 365/366 days and the month here is 28/29/30/31 days, that means your birthday may not mean you will be 0 days old.

**Don’t worry I will not share your input.

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A person’s age can be counted differently in different cultures. This calculator is based on the most common age system. In this system, age increases on birthdays. For example, a person who has lived 3 years 11 months, his age is 3 and after one month his age will be 4 on his next birthday. Most Western countries use this age system.

In some cultures, age is expressed by counting years with or without including the current year. For example, a person who is twenty years old is the same person who is in his twenty-first year of life. In one of the traditional Chinese era systems, people are born at age 1, and age increases in the traditional Chinese New Year rather than birthdays. For example, if a child is born exactly one day before Traditional Chinese New Year, then 2 days later, the child will be 2 years old, even if it is only 2 days old.

In some situations, the months and days results of this age calculator can be confusing, especially when the start date is at the end of a month. For example, we all consider 20 February to 20 March as a month. However, there are two ways to calculate the age from February 28, 2015, to March 31, 2015. If 28 February to 28 March is considered as a month, then the result is one month and 3 days. If both 28 February and 31 March are considered as the end of the month, then the result is one month. Both calculation results are reasonable. Similar conditions exist for the dates 30 April to 31 May, 30 May to 30 June, etc. The confusion arises from the uneven number of days in different months. In our calculations, we used the former method.