Machine RPM Calculator – By Pulley Size and Motor RPM

To calculate the RPM of the machine, provide the dimensions in millimeters. To calculate the RPM, enter the motor RPM, pulley 1 diameter, and pulley 2 diameter, and click calculate.

RPM Calculator Formula

To calculate machine RPM we need motor RPM and both pulley sizes. Specify the dimension unit in millimeters for consistency.

If you have inches dimension and want to convert in millimeters, then convert mm to inches in a few seconds.

However, enter all the details and select the “Calculate” button. This RPM calculator will provide you with accurate results including machine RPM, motor RPM, pulley 1 diameter, and pulley 2 (driven) diameter.

The formula for machine RPM is mentioned below:

Machine RPM= (Motor r.p.m × Pulley 1 diameter) ÷ Pulley 2 diameter

Example: RPM= {(1465 x 200) ÷ 250}= 1172 (rpm)

1. Motor RPM (1465) is the rotational speed of the motor.
2. Pulley 1 diameter (200) refers to the diameter of the motor(drive) pulley.
3. Pulley 2 diameter (250) represents the diameter of the driven pulley.

Note: All dimensions are in mm.

Related calculators:

• Pulley & Belt Size
• Weight Converter
• Inch-mm Converter