What is the formula to convert RPM to Hz?

Divide RPM by 60. One revolution per minute equals 1/60 of a revolution per second, and one hertz equals one cycle per second, so Hz = RPM / 60.

What is 3000 RPM in hertz?

3000 RPM / 60 = 50 Hz. This is the synchronous speed of a 2-pole AC motor on a 50 Hz grid.

What is 3600 RPM in hertz?

3600 RPM / 60 = 60 Hz. This matches the synchronous speed of a 2-pole AC motor on the 60 Hz North American grid.

Why convert RPM to Hz?

Many electrical and vibration calculations require frequency in hertz. VFDs, signal processing, and resonance analysis all work in Hz, so converting rotational speed is a common step in motor, pump, and mechanical engineering.

Is RPM the same as Hz?

No. RPM measures revolutions per minute while Hz measures cycles per second. They describe the same physical rotation at different time scales. To convert: Hz = RPM / 60.

RPM to Hertz Converter

Enter a value in RPM and instantly get the equivalent frequency in hertz (Hz = RPM / 60).

Convert RPM ↔ Hz

Rotational Speed (RPM)

RPM

Frequency (Hz)

Formula

Hz = RPM ÷ 60

One hertz equals one cycle per second. One revolution per minute equals 1/60 revolution per second.

Common Reference Values

Summary

RPM (revolutions per minute) and hertz (Hz) both describe rotational or cyclic frequency, but on different time scales. This converter applies the exact formula Hz = RPM / 60, giving you instant results in either direction. Common use cases include motor speed calculations, VFD programming, vibration analysis, and AC electrical engineering.

How it works

Enter a rotational speed value in the RPM field.
The equivalent frequency in hertz appears instantly.
Use the reverse field to convert Hz back to RPM.
Click a preset button to load a common reference value.
Copy the result with the Copy button.

Use cases

Convert motor or engine speed to frequency for electrical calculations.
Match pump or fan RPM to AC frequency requirements.
Check if a spinning component frequency aligns with resonance thresholds.
Convert turntable or hard drive spin speed to Hz for audio/storage analysis.
Verify VFD (variable frequency drive) output against shaft speed.
Convert compressor RPM to Hz for HVAC system design.

Frequently Asked Questions

Last updated: 2026-06-19 · Reviewed by Nham Vu