Frequency Converter

Runs locally in your browser. Nothing leaves your device.

Instantly convert frequency between hertz, kilohertz, megahertz, gigahertz, RPM, BPM, and radians per second.

Use a comma or period as the decimal separator; do not use thousands separators.

All units

SI frequency

Nanohertz (nHz)
1,000,000,000
Microhertz (µHz)
1,000,000
Millihertz (mHz)
1,000
Hertz (Hz)
From
1
Kilohertz (kHz)
0.001
Megahertz (MHz)
0.000001
Gigahertz (GHz)
1e-9
Terahertz (THz)
1e-12
Petahertz (PHz)
1e-15

Events and tempo

Cycles per day (cpd)
86,400
Cycles per hour (cph)
3,600
Cycles per minute (cpm)
60
Beats per minute (BPM)
60
Cycles per second (cps)
1

Rotation

Revolutions per minute (rpm)
To
60
Revolutions per second (r/s)
1

Angular frequency

Degrees per second (°/s)
360
Radians per second (rad/s)
6.28318531

How it works

  1. 1

    Enter value and source unit

    Enter the frequency value and choose the source unit.

  2. 2

    Choose the target unit

    Choose the target unit from one of the four groups.

  3. 3

    Copy the result

    Copy one or all results for further use.

Good to know

The frequency converter converts directly in your browser between SI frequency, angular frequency, rotation, and events/tempo. 1 Hz equals one complete periodic event per second; angular frequency ω = 2πf is larger by a factor of 2π than plain frequency.

Calculation runs locally in the browser. 60 rpm equals 1 Hz when one revolution counts as a cycle, and 60 BPM equals 1 Hz when one beat counts as an event; signal work may also require sample rate, bandwidth, and tolerances.

Typical use cases

Convert signal frequencies between orders of magnitude

Convert Hz to kHz, MHz, or GHz, for example for processor clocks, radio frequencies, or audio signals.

Convert rotational speed into frequency

Convert revolutions per minute into hertz, for example for motors, hard drives, or rotating machine parts.

Tips for better results

Don't confuse frequency and angular frequency

ω (rad/s) is larger than f (Hz) by a factor of 2π — using the correct quantity matters in physics formulas.

Period duration belongs to a different calculator

The period is the reciprocal of frequency, but is not calculated directly here — use a dedicated tool for that.

Features

  • Four unit groups

    SI frequency, angular frequency, rotation, and events/tempo are separated.

  • Local conversion

    Calculation happens directly in the browser, without transmission to a server.

  • Event-based units such as BPM and rpm

    Also convert everyday frequency figures such as revolutions per minute or beats per minute.

Frequently asked questions

What's the difference between frequency and angular frequency?

Frequency f is measured in hertz, angular frequency ω in rad/s and is larger by a factor of 2π (ω = 2πf).

Are my inputs uploaded?

No. Conversion runs entirely locally in the browser.

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