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Belt Length Calculator
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Pyrathane Belt Length Calculator
(Calculates the length of a belt going around two pulleys)

Enter center distance between pulleys
Enter 1st pulley diameter at belt center
Enter 2nd pulley diameter at belt center
Enter stretch percentage desired (7.5, 10, 12.5%, etc.)
Which Equals around application at belt center.
Which Equals calculated belt length including 0 % stretch.
Note: If the diameter of the pulleys at the belt center is unknown add one belt cross section to the diameter of the pulley when measured at the surface where the belt rides, i.e. the bottom of a belt groove or the face of a flat pulley.


Pyramid Incorporated • 522 N 9th Ave E • PO Box 200 • Newton, IA 50208-0200