Motorcycle Chain Length

Calculate chain links from sprocket teeth and center distance.

Inputs

Front Sprocket Teeth

Rear Sprocket Teeth

Center Distance

Chain Pitch

Tab to move between fields

Results

Calculated Links

100

Recommended (Even)

100

Chain Length1,587.5 mm

How to Use This Calculator

Enter Front Sprocket Teeth, Rear Sprocket Teeth, and Center Distance.
Set Chain Pitch.
Review Calculated Links and Recommended (Even).
Use Chain Length (mm) to inform your decision.

How the result changes with Chain Pitch

Chain Pitch	Calculated Links	Recommended (Even)
11	131	132
14	110	110
17	96	96
19	89	90

What each input means

Front Sprocket Teeth: Number of teeth on the front/countershaft sprocket.
Rear Sprocket Teeth: Number of teeth on the rear sprocket.
Center Distance: Distance between sprocket centers in mm.
Chain Pitch: Chain pitch (15.875mm for 520 chain).

How this is calculated

Worked example, using the default values

Identify Input Parameters
4 parameters
Front Sprocket Teeth = 15, Rear Sprocket Teeth = 45, Center Distance = 550, Chain Pitch = 15.875 = 4 input(s) provided
Calculate Calculated Links
100 = 100
Calculate Recommended
Recommended = evenLinks
100 = 100
Calculate Chain Length
Chain Length
1587.5 = 1587.5

Engine last updated August 5, 2026. Checked against 1 independently-derived test — how we verify calculators.

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