Reach Advantage Calculator

Analyze reach differential, ape index, and optimal fighting range strategy against your opponent.

Inputs

Your Reach

Opponent Reach

Your Height

Opponent Height

Tab to move between fields

Results

Reach Differential

2 in

Range Strategy

Slight outside advantage — use range management and long strikes

Your Ape Index2 in

Opponent Ape Index1 in

Your Reach-to-Height Ratio1.029

Opponent Reach-to-Height Ratio1.014

How to Use This Calculator

Enter Your Reach and Opponent's Reach in inches.
Enter Your Height and Opponent's Height in inches.
Review the Reach Differential (positive means you have the longer reach).
Check Ape Index for both fighters (positive = longer arms relative to height).
Use Reach-to-Height Ratio and Range Advantage to understand the striking distance matchup.

How the result changes with Your Reach

Your Reach	Reach Differential	Range Strategy
54	-16 in	Significant reach disadvantage — close distance quickly, work inside
64	-6 in	Significant reach disadvantage — close distance quickly, work inside
76	6 in	Strong outside advantage — use jabs, front kicks, maintain distance
86	16 in	Strong outside advantage — use jabs, front kicks, maintain distance

What each input means

Your Reach: Your wingspan measured fingertip to fingertip with arms extended horizontally.
Opponent Reach: Your opponent's wingspan. Often listed in fight promotion stats.
Your Height: Your height in inches. Used to calculate your ape index.
Opponent Height: Your opponent's height in inches. Used to calculate their ape index.

How this is calculated

Worked example, using the default values

Identify Input Parameters
4 parameters
Your Reach = 72, Opponent Reach = 70, Your Height = 70, Opponent Height = 69 = 4 input(s) provided
Calculate Reach Differential
Reach Differential
2 = 2
Calculate Range Strategy
Slight outside advantage — use range management and long strikes = Slight outside advantage — use range management and long strikes
Calculate Your Ape Index
Your Ape Index
2 = 2
Calculate Opponent Ape Index
Opponent Ape Index
1 = 1

Engine last updated July 28, 2026. Checked against 2 independently-derived tests — how we verify calculators.

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