Calculate the age of a person, place or thing. The age calculator calculates age given a date of birth in years, months and days. You can also use this calculator to find length of time between two dates. The age calculator finds age in years, months and days, months and days, weeks and days, and in total days, total hours, total minutes, and total seconds.
The age calculator uses a function that recognizes how many leap years are in a given time span. It also calculates the specific number of days in a partial year. For example, if you were born on March 5 and today is June 7, the calculator finds the exact number of days that occur between those dates.
If you want to know how many days you've been alive you need to account for extra days in leap years. You also need to know the months with 31 days, those months with 30 days, and the month with 28 days.
The age calculator allows you to input single digit days. You do not have to pad them with a leading zero if the date is less than 10. You can input the 4-digit year, or use the date picker option.
This calculator assumes the start date is day 0 and begins counting one full day after day 0. For example if you input the dates 03/15/2022 and 3/18/2022 into the calculator you will get a total age of 3 days. Day 1 is the 16th, day 2 is the 17th, and day 3 is the 18th. The 15th is not counted in the tally of days.