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`"belt length" = ( D_D + D_d )*pi/2 +( "L" *2)+ ( ( D_D - D_d )^2 / ( "L" *4) )`

Enter a value for all fields

The **Length of a Belt** calculator computes the length of a belt that goes around two pulleys * Belt length around two pulleys.* based on the pulley diameters (D

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

- (
**D**) This is the diameter of the first pulley_{D} - (
**D**) This is the diameter of the second pulley_{d} - (
**L**) This is the distance between the pulley axles.

**Belt Length (BL):** The calculator return the belt length (**BL**) in meters. However, this can be automatically converted to other length units via the pull-down menu.

The length of a belt on two pulleys formula is:

**BL = (D _{D}+D_{d})•π/2 +(L•2)+ ( (D_{D}-D_{d})² / (L•4) )**

where:

- BL is the belt length
- D
_{D}is the diameter of the first pulley. - D
_{d}is the diameter of the second pulley. - L is the distance between the axles.

**Lever Beam Length****Leverage Lift Weight****Fulcrum Position****Belt Length****Belt Speed**.**Pulley RPMs****2nd Pulley RPMs****2nd Pulley Diameter****RPM of 4th pulley on three shafts****2nd Gear RPM**- To compute the sum of two lengths

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