Age Comparison Calculator

Calculates from the birth dates of two people, how many times older one person is compared to the other person. The current date is preset, here any other date can be entered to make an age comparison for another point of time. The comparison is exact to days, the hour of birth is neglected. The names of the persons, whose age is to be compared, can be entered. Of course, for both persons, the date of birth must be entered.

Date of birth :

. .

Date of birth :

. .

Current date: . .

Person 1 is x times as old as Person 2. Person 2 is 1/x times as old as Person 1.
Person 1 is y days older / younger than Person 2.

Example: Person 1 was born on January 1, 2000, and Person 2 on December 15, 1983. The reference date is June 11, 2024, because that is the day this text was written. Then Person Two is 1.656 times as old as Person One, the age difference is 5861 days.

The age ratio starts at infinity on the day the younger person was born and then gets smaller and smaller as time progresses. It approaches one, but never reaches it. The age difference, on the other hand, of course always remains the same. The difference in age is given in days, because days, unlike months and years, have a unique length. If you want to know the age difference in years, you can divide the value in days by the length of an average year, namely 365.2421875 days per year.

Of course, this calculator is not just limited to people, you can also use it to calculate the age of animals if you know their birth dates. Even man-made objects can be compared based on their production date. Examples of things where age plays a big role are cars and houses.