How to use

The frequency converter normalizes repeating and rotational rates through hertz. SI-prefix units such as kHz, MHz and GHz are decimal scales, while RPM and BPM introduce a factor of 60 and angular frequency in rad/s differs from Hz by 2π.

Enter a non-negative frequency value.
Choose source and target units from hertz-based, rotational or per-minute rate units.
Calculate to see the target value plus Hz, kHz, RPM, rad/s and period when frequency is above zero.

How it is calculated

1 Hz = 1 cycle/s = 60 RPM; angular frequency ω = 2πf; period T = 1/f

Example

Example: 3,000 RPM = 50 Hz = 0.05 kHz ≈ 314.15926536 rad/s, and a 50 Hz cycle has a 0.02 s period. Likewise 2.4 GHz = 2,400 MHz.

Important notes

Hz counts complete cycles per second, while rad/s measures angular change, so 1 Hz = 2π rad/s rather than 1 rad/s. RPM, BPM and CPM share the same numerical per-minute conversion when one event corresponds to one cycle, but their physical meaning differs. T=1/f is unbounded at f=0, shown as ∞.

Frequently asked questions

How do I convert RPM to Hz?

Divide RPM by 60; for example 3,600 RPM = 60 Hz.

What is the difference between Hz and rad/s?

Hz counts cycles per second; rad/s is angular frequency, with ω=2πf.

Is GHz 1,000 times MHz?

Yes. 1 GHz = 1,000 MHz = 1,000,000 kHz = 1,000,000,000 Hz.

Is this calculator free?

Yes. It is free to use and requires no account.

Frequency Converter