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Frequency Converter

Convert between hertz, kHz, MHz, GHz, THz, rpm, and bpm at once.

Frequency
Converted values
Hertz
Hz
440
Kilohertz
kHz
0.44
Megahertz
MHz
0.0004
Gigahertz
GHz
4.4000e-7
Terahertz
THz
4.4000e-10
Revolutions / min
rpm
26400
Beats / min
bpm
26400
Common frequencies
Concert pitch A4440 Hz
AM radio band540 to 1600 kHz
FM radio band88 to 108 MHz
Wi-Fi (2.4 band)2.4 GHz
Typical CPU clock3 to 5 GHz
Resting heart rate60 to 100 bpm

How to convert frequency units

  1. Enter a value

    Type a frequency into any unit field, from hertz up to terahertz or into rpm and bpm.

  2. Read every unit

    All other units update instantly from your input using a shared hertz base.

  3. Tune precision

    Move the precision slider to control how many decimal places each result shows.

  4. Copy a result

    Use the copy button on any row to place that value on your clipboard.

Why use this tool

Every unit at once

One value fills all seven units together, so you never chain two separate conversions.

Edit any field

Type into hertz, megahertz, or rpm. Whichever field you touch becomes the source and the rest follow.

Adjustable precision

Choose from zero up to ten decimal places, with automatic compact notation for very large or tiny values.

Per-minute units

Rotational speed in rpm and tempo in bpm are handled as cycles per minute, correctly scaled against per-second hertz.

Reference table

A quick table of common frequencies helps you sanity-check radio, audio, and processor ranges.

Private by design

Every calculation runs on your device. Nothing you type is uploaded or stored.

About this tool

Frequency measures how many times something repeats in a given span of time. The base unit is the hertz, defined as one cycle per second. Larger signals are counted in kilohertz, megahertz, gigahertz, and terahertz, each a thousand times the one before. Rotational and rhythmic rates are usually counted per minute instead, which is why revolutions per minute and beats per minute belong on the same scale once you divide by sixty.

This converter keeps a single hertz value behind the scenes. When you type into any field, that entry is turned into hertz and then expanded back out into every other unit, so all seven readings always agree. Editing megahertz, rpm, or bpm works exactly the same way, because there is no fixed source and destination. Whatever field you touch leads, and the rest follow on the next keystroke.

Results respect the precision you pick, from whole numbers up to ten decimal places. Very large counts such as terahertz values and very small fractions are shown in compact notation so a readout never runs off the row or collapses to zero. Empty or invalid entries simply clear the other fields rather than showing a broken number.

For related work, try the general unit converter, match a musical tempo with the bpm counter, or explore other physical scales like the angle converter and speed converter.

Frequently asked questions

How do I convert Hz to kHz, MHz, or GHz?
Type your value into the hertz field. Kilohertz is that number divided by a thousand, megahertz by a million, and gigahertz by a billion. All three update at once as you type.
How are rpm and bpm related to hertz?
Revolutions per minute and beats per minute count cycles over a minute, while hertz counts them over a second. One hertz equals sixty rpm, so the converter divides or multiplies by sixty to bridge the two.
What is the largest frequency I can enter?
You can enter values well into the terahertz range. Extremely large or small results switch to compact notation so they stay readable instead of overflowing the field.
Why do my other fields go blank?
A blank or non-numeric entry has no defined frequency, so the other units clear rather than display a meaningless number. Enter a valid value and they fill back in.
Is my data sent anywhere?
No. The conversion happens entirely on your device as you type, and nothing you enter leaves the page or is saved.

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