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`BS = pi/2* "D" * "RPMs" `

Enter a value for all fields

The **Speed of a Belt** calculator computes the speed at which a linear length of belt travels around a pulley based on the diameter (D) of the pulley and the rotation rate (R).*Belt*

**INSTRUCTIONS:** Choose units and enter the following:

- (
**D**) Diameter of Pulley - (
**RPM**) Rotation Rate

**Belt Speed (BS):** The calculator computes the belt speed in feet per second. However, this can be automatically converted to other velocity units via the pull-down menu.

The formula for the speed of the belt is:

BS = (D •π • R)/(2π) = ½•D•RPM

where:

- BS is the Belt Speed
- D is the diameter of the pulley
- RPM is the rotation rate (rpms) of the pulley

**Lever Beam Length****Leverage Lift Weight****Fulcrum Position****Belt Length****Belt Speed****RPMs to Linear Velocity****RPMs from linear velocity and diameter****2nd Pulley RPMs****2nd Pulley Diameter****RPM of 4th pulley on three shafts****2nd Gear RPM****Sum of Two Lengths****Second Gear Torque**

- Handyman In~Your~Pocket page 42 :(Young and Glover)2012 published by Sequoia Publishing Inc of Littleton, Colorado, U.S.A.