Mechanical / Belt drives

Belt Length Calculator

Estimate pitch-line length and wrap angles for a two-pulley open-belt drive.

Open belt geometry

Linear unitPulley A pitch diameterPulley B pitch diameterCentre distance

Open-belt estimate

Approximate belt length1,476.239 mm

Pitch-line length

Open-belt length: 1,476.239 mm
Smaller pulley wrap: 168.522°
Larger pulley wrap: 191.478°

Use pulley pitch diameters, not outside diameters. Select the nearest manufacturer belt and use the drive’s adjustment range or tensioner to accommodate the available standard length.