Sprocket Diameter Calculator

Note: Diameter of the sprocket is defined by the circle through the centerline of the chain rollers

*Roller Chain Dimensions in Inches

Chain #
Pitch
Roller Diameter
Roller Width
35
.375
.200
.1875
40
.500
.312
.3125
420
.500
.306
.3125
41
.500
.306
.2500
520
.625
.400
.2500
530
.625
.400
.3750
Input Answer
Chain Pitch (inches)
Number of Sprocket Teeth
Sprocket Diameter

Example Below: