Enter your height and arm span into the calculator to determine your ape index.

Ape Index Calculation Formula

The following formula is used to calculate the ape index from your height and arm span.

Ape Index = Arm Span - Height

Variables:

  • Ape Index is the difference between your arm span and height (cm)
  • Height is your height (cm)
  • Arm Span is the length of your outstretched arms (cm)

To calculate the ape index, subtract your height from your arm span.

What is Ape Index Calculation?

Ape index calculation refers to the process of determining the difference between your arm span and your height. This metric is often used by climbers and athletes to understand their physical proportions. A positive ape index indicates that your arm span is greater than your height, which can be advantageous in sports requiring a long reach.

How to Calculate Ape Index?

The following steps outline how to calculate the ape index using the given formula.


  1. First, measure your height in centimeters.
  2. Next, measure your arm span from fingertip to fingertip.
  3. Use the formula from above: Ape Index = Arm Span – Height.