RPM to Hertz Converter
Translate mechanical or audio speeds into cycles per second. Enter a value in RPM to see its frequency in hertz and better match control systems, instrumentation, or signal requirements.
Assumes constant rotational speed without gear losses or slip. Verify with instrumentation for safety-critical systems.
Examples
- 120 RPM ⇒ 2 Hz
- 3,600 RPM ⇒ 60 Hz
- 7,200 RPM ⇒ 120 Hz
FAQ
What is a hertz?
A hertz (Hz) measures cycles per second. Converting RPM to Hz tells you how many full rotations occur every second.
Can I enter fractional RPM?
Yes. Fractional RPM values convert cleanly and are useful for slow-moving mechanisms like clock hands or conveyor systems.
How do I convert hertz back to RPM?
Multiply hertz by 60 to return to revolutions per minute.
Does direction of rotation matter?
No. The conversion only considers magnitude. Use separate instrumentation if direction or phase matters.
Where is this conversion used?
Engineers use it to match motor speeds to AC line frequency, DJs convert turntable RPM to Hz when aligning beat frequencies, and vibration analysts compare machine speeds to natural frequencies.
Additional Information
- Formula: Hz = RPM ÷ 60.
- 1 Hz equals 60 RPM, so 50 Hz motors spin at roughly 3,000 RPM before accounting for slip.
- When monitoring vibrations, compare the converted Hz against bearing fault frequencies to spot resonance.
- Use precise tachometer readings for critical equipment to avoid rounding errors in safety analyses.