Ape Index Calculator

The calculation relies on two distinct mathematical methods to express the relationship between your wingspan (fingertip to fingertip across outstretched arms) and your overall height. The first method, known as the ratio ape index, is expressed as Ape Index = Wingspan / Height. A result greater than 1.0 indicates a positive index. The second method, the absolute difference, is expressed as Ape Index Ver 2 = Wingspan - Height, which outputs a positive or negative linear measurement in inches or centimeters.

Imagine a rock climber who stands at 70 inches tall (5 feet 10 inches) and boasts a total arm wingspan of 73 inches. To find the ratio ape index, divide the wingspan by the height: 73 / 70 = 1.042. Next, to find the absolute difference, subtract the height from the wingspan: 73 - 70 = +3 inches. This indicates a positive ape index of 3 inches, meaning the climber's reach exceeds their height by a notable margin.

For the most accurate measurement, stand flat against a wall with your arms stretched horizontally as wide as possible, and have a partner measure from the tip of your middle finger on one hand to the tip of your middle finger on the other. Always measure your height without shoes on firm flooring. Keep in mind that while a positive ape index is advantageous in rock climbing and swimming, proper technique, core strength, and training remain far more critical for athletic success than body proportions alone.