# Maryland Metrics: Belt length Calculator

This calculator will calculate the approximate belt length required for a belt and pulley drive system.  It is based upon the center distance between the "driving" and the "driven" shafts, and the "active" or "pitch" diameters of the pulleys/sheaves.  The pitch diameter is the specified diameter of a pulley/sheave for a given belt type, it is not the outside diameter of the pulley/sheave.  To get the gear ratio of a drive simply divide the pitch diameters of the pulleys/sheaves. The belt length is only an approximate figure but the specified length should be within the final adjustment range of the idler pulleys or the adjustable centers of the shafts.

Enter the data in the following fields and press the "Calculate" button. The answers will appear below.

Enter the pitch diameter of the 1st pulley in millimeters:. or inches:
Enter the pitch diameter of the 2nd pulley in millimeters: or inches:
Enter the shaft center distance in millimeters: .............. or inches:

or .

Results computed from input data:

 Belt length (mm) (inches) Gear Ratio : 1

Belt length / Center Distance Calculator

# Center Distance Calculator

This calculator computes the shaft center distance of a drive based on the length of a belt and the pitch diameters of the pulleys/sheaves.  The pitch diameter is the specified diameter of a pulley/sheave for a given belt type, it is not the outside diameter of the pulley/sheave.  To get the gear ratio of a drive simply divide the pitch diameters of the pulleys/sheaves.  The belt length is only an approximate figure but the specified length should be within the final adjustment range of the idler pulleys or the adjustable centers of the shafts.

Enter the diameter of the 1st pulley in millimeter:. or inches:
Enter the diameter of the 2nd pulley in millimeter: or inches:
Enter the belt length in millimeter:............................ or inches:

or .

Results computed from input data:

 Center Distance (mm) (inches) Gear Ratio : 1

 THINK!- MARYLAND METRICS - The One-Stop Source for Metric & British Sized Fasteners, Wrenches, Cutting, & Measuring Tools, Metal Shapes, Oil Seals, O-Rings, Mechanical Power Transmission Equipment, Bearings, Hydraulic And Pneumatic Fittings & Tubing, Workholding Components, Plumbing Fittings, & Some Electrical & Electronic Components. Click to go to Maryland Metrics home page

Phones: (800) 638-1830 or (410) 358-3130 are available Monday-Friday 8:30 AM to 5:30 PM Eastern time.
Faxes: (800) 872-9329 or (410) 358-3142 & E-mail are available anytime.
Warehouse & showroom hours are Monday-Friday 10 AM to 5:30 PM.
[ To: Maryland Metrics home page ] [ To: Maryland Metrics Product Guide ] [ e-mail to Maryland Metrics ]