RPM Calculator

Calculate RPM (revolutions per minute) for motors and rotating equipment.

Motion Parameters

Linear Speed (mph)

Wheel Diameter (inches)

Rotational Speed

RPM776

Angular Velocity81.2 rad/s

Overview

RPM calculation for motors, wheels, and rotating equipment. Motor RPM depends on frequency and poles. Wheel RPM relates to vehicle speed. Essential for mechanical design.

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Pro Tips

60 Hz, 4-pole motor: 1800 RPM synchronous.
Actual RPM slightly less (slip).
Gear ratio changes output RPM.
Tachometer measures actual RPM.

Fun Facts

"2-pole motor: 3600 RPM (60 Hz)."
"Car engine: 600-7000 RPM typical."
"Hard drive: 5400-7200 RPM."
"F1 engine: 15,000+ RPM."

Formula: Motor RPM = (120 × Frequency) / Poles; Wheel RPM = Speed / Circumference

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