Frequency Converter

Written byOleh Soloninupdated 25 September 2026

Value

From

Result

Result1
From unitmegahertz
To unitgigahertz
Conversion factor0.001
Inverse factor1,000
In other units
hertz: 1,000,000,000 kilohertz: 1,000,000 terahertz: 0.001 revolution per minute: 60,000,000,000 beat per minute: 60,000,000,000

Revolutions per minute are frequencies too

Converts frequency between hertz, kilohertz, megahertz and gigahertz, plus revolutions and beats per minute.

The hertz prefixes used here behave predictably: kilo, mega, giga and tera each step up by a thousand. Radio lives in megahertz, processors in gigahertz, audio in kilohertz, and mains electricity in a modest fifty.

Revolutions per minute and heartbeats sit apart only because they are counted per minute rather than per second. Three thousand engine revolutions is exactly fifty hertz — the same as the mains.

How to use

Enter a frequency.
Choose the unit you are converting from: hertz with prefixes up to terahertz, revolutions per minute or beats per minute.
Choose the unit you are converting to. Below it you get the factors and the same value in the other units.

Hertz and its prefixes

Each prefix is a thousand times the one before. An FM station on 101.5 MHz is 101,500 kHz, 2.4 GHz Wi-Fi is 2,400 MHz, and a CD's 44.1 kHz sample rate is 44,100 Hz.

Every row comes from the calculator on this page.
From	To
1 GHz	1,000 MHz
1 THz	1,000 GHz
2.4 GHz	2,400 MHz
101.5 MHz	101,500 kHz
44.1 kHz	44,100 Hz
440 Hz	0.44 kHz

Revolutions and beats per minute

RPM and BPM are hertz counted per minute: divide by 60. An engine at 3,000 rpm turns at 50 Hz; a pulse of 72 bpm is 1.2 Hz.

Every row comes from the calculator on this page.
From	To
3,000 rpm	50 Hz
7,200 rpm	120 Hz
50 Hz	3,000 rpm
60 bpm	1 Hz
72 bpm	1.2 Hz

What this calculator shows

A conversion between the pair of frequency units you pick
The conversion factor in both directions
The same quantity in the other units on the list

What to keep in mind

Revolutions and beats per minute convert by dividing by sixty: one sixtieth of a hertz.
Audio sample rate and processor clock speed use the same hertz but describe quite different processes.

FAQs

How many megahertz in a gigahertz?

A thousand. A megahertz is a thousand kilohertz, a kilohertz a thousand hertz.

How do I convert rpm to Hz?

Divide by 60. 3,000 rpm is 50 Hz and 7,200 rpm is 120 Hz.

What frequency is mains electricity?

50 Hz in Europe and Russia, 60 Hz in the US and parts of Asia — which is why otherwise identical motors have different rated speeds.

How many hertz is a heart rate?

Beats per minute divided by 60: a pulse of 60 is 1 Hz, 72 is 1.2 Hz.

What does 44.1 kHz mean for audio?

44,100 samples a second — the CD sample rate. It is not the pitch of the sound but how often its level is recorded.

What frequency is concert A?

440 Hz, the standard tuning pitch. In kilohertz that is 0.44.

Worked example

A thousand megahertz

Input: 1,000 MHz into gigahertz

Output: 1 GHz

Note: Exactly one gigahertz: along the kilo, mega, giga, tera chain each prefix is a thousand times the one before. In revolutions the same frequency is 60 billion a minute, which shows the gulf in scale between electronics and mechanics.

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Frequency Converter

Result

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