ClimbCalc

Ape Index Calculator

Your Ape Index is:
2.00 cm / 0.79 in

Other Ape Index calculation methods

MethodResult
Reach Advantage2.00 cm / 0.79 in
Ratio1.01
Percentage1.11
Logarithmic0.30

Methods to calculate Ape Index

Standard Ape Index (Reach Advantage Index)

This is the most common and widely used way to calculate ape index in climbing. It simply subtracts your height from your wingspan. A positive value means your reach is longer than your height, which can be advantageous on reachy moves, while a negative value means your wingspan is shorter. Most climbers and coaches refer to this method when talking about ape index.

Ratio

The ratio method divides wingspan by height, producing a dimensionless number. A value of 1.00 means your wingspan and height are equal, while values above or below indicate longer or shorter reach respectively. This method is sometimes preferred because it scales naturally across different body sizes, making it useful for comparisons between climbers of different heights.

Percentage

The percentage method expresses the difference between wingspan and height relative to height. It shows how much longer or shorter your wingspan is as a percentage of your body height. This can make small differences easier to interpret, especially when comparing multiple climbers, but it is less commonly used in everyday climbing discussions.

Logarithmic

The logarithmic method applies a mathematical transformation to the ratio between wingspan and height. It is mainly used in biomechanical or research contexts rather than practical climbing. While it can highlight proportional differences more strongly, it is not intuitive for most climbers and is rarely used for training or performance comparisons. It is usually calibrated, so that a gorilla would have a value of 10