Ape Index Calculator
Calculate the ratio between your arm span and height to determine your natural climbing advantage
Disclaimer: Results are for informational purposes only and not a substitute for professional assessment.
Your Results
Height:
Arm Span:
Ape Index:
Ratio:
What is the Ape Index?
The Ape Index is a measurement used in climbing that compares your arm span to your height. A positive ape index means your arm span is greater than your height, potentially giving you a mechanical advantage in climbing by allowing you to reach holds that might otherwise be out of reach.
Interpretation Guide
- +6 or more: Exceptional reach advantage
- +1 to +5: Positive advantage
- 0: Neutral (equal measurements)
- -5 to -1: Slight disadvantage
- -6 or less: Significant disadvantage
Average Ape Index by Group
- World-class climbers: +1 to +4
- Recreational climbers: -1 to +2
- Average adults: -1 to +1
- Elite swimmers: +2 to +6
- Basketball players: +3 to +8
How to Measure Correctly
- Stand with your back against a wall, heels touching the wall
- Have someone mark your height
- Extend your arms horizontally like a "T" position
- Measure from middle fingertip to middle fingertip
- Subtract your height from your arm span (or use our calculator)
Note: This calculator is provided for informational purposes. Climbing ability depends on many factors beyond physical measurements, including technique, strength, flexibility, and mental skills.