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ENGINEERING TOOL

V-Belt Length Calculator

Estimate open-belt pitch length and small-pulley wrap angle from pulley pitch diameters and center distance.

V-Belt Length Calculator

FREE ONLINE TOOL

Approximate pitch length

1,476.2389 mm

Small pulley wrap angle

168.5217 °

Formula and assumptions

L ≈ 2C + π(D+d)/2 + (D−d)²/(4C); wrap = π − 2asin((D−d)/(2C))

Open two-pulley drive only. Use pitch diameters, not outside diameters. Approximate pitch length does not select a standard V-belt section, inside length, tension or power rating. Verify manufacturer dimensions.

Technical reference: Gates — Belt Sizing Guide

STEP BY STEP

How to use v-belt length calculator

  1. Check the input units and assumptions.
  2. Review the result and example.

IN PRACTICE

Example

100 mm / 200 mm pulleys, 500 mm centers: L ≈ 1476.24 mm.

GOOD TO KNOW

Which model does this calculator use?

Open two-pulley drive only. Use pitch diameters, not outside diameters. Approximate pitch length does not select a standard V-belt section, inside length, tension or power rating. Verify manufacturer dimensions.

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