Age Calculator

Add your date of birth to calculate your age in years, months, weeks, days, hours, minutes, and seconds.

Created by Helen Stark
Helen Stark
Helen Stark

Student of Harvard university, she loves to observe new things about society, she studies Wikipedia more and learns about quantum physics on the internet. She loves dancing and singing songs.

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Reviewed by Nick Walker
Nick Walker
Nick Walker

Done PHD of nuclear physics from the University of Pennsylvania. He is always seeking ways to explain science in easy terms. Moreover, he loves coffee & its beans more than his girlfriend (not at all).

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Use this age calculator to calculate your exact age and years, months, weeks, days, hours, minutes, and seconds you have lived till today. It will also make certain calculations and show some informative facts about your life and age-related comparisons.

How Old Am I?

It is based on your date of birth, let our age calculator calculate your age chronologically. 

  1. Add your Date of Birth
  2. Click “Calculate your Age
  3. Get how old are you and age-related calculations

How to Calculate Age?

Different aging systems have their own rules for calculating age. The most common and broadly accepted of them is the International age system. According to it, you can determine your age by two different methods, including:

  1. For age in years, assume all years have the same number of days (365). This eliminates the need for counting leap years (366 days). For example, if you are 25 years old, you will not say that you are 18 regular years plus 7 leap years old.
  2. Alternatively, you can calculate your age in days only. But this accounts for the number of days in each month to ensure more accurate results. For example, suppose you were born on March 01, 2005, and today is February 23, 2024. So age in days will be equal to the accurate number of days between these two dates.

Our age calculator also calculates how many days you have lived so far by considering the following equation:

Age in days = Number of years with 365 days + Number of years with 366 days + Days remaining in the current year


  • Calculations are based on the date of birth you enter. Make sure you provide an accurate date to avoid wrong calculations.
  • The tool might give different results for birthdays falling in leap years.

Related: You can also calculate how old you are in Korea with our Korean age calculator which calculates your age according to the Korean age reckoning system.