Advanced 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.
Your Age
About Age Calculation
The age of a person can be counted differently in different cultures. This calculator is based on the most common age system where age increases on a person’s birthday.
In some situations, the months and day result of this age calculator may be confusing, especially when the starting date is the end of a month. We use a method that counts from a specific date to the same date in the following month.
The way people count age varies across different cultures. This calculator uses the most common system where a person's age increases on their birthday. For instance, someone who is 3 years and 11 months old is considered 3 years old, and they'll turn 4 on their next birthday in one month. This is the system used in most Western countries.
In other cultures, age might be counted differently - sometimes including the current year, sometimes not. For example, in traditional Chinese culture, babies are considered 1 year old at birth, and everyone adds a year to their age at the Chinese New Year rather than on their birthday. So a baby born just before the New Year would be considered 2 years old just days after birth, even though they've only been alive for a few days.
Calculating age can sometimes be confusing when dealing with months that have different numbers of days. For example, from February 20 to March 20 is clearly one month. But from February 28 to March 31 could be calculated as either one month (if we consider both as month-ends) or one month and 3 days (if we count exactly 28 days later). Similar situations occur with dates like April 30 to May 31. This calculator uses the method that counts exact days between dates.