Frequency ConverterConvert between Hertz, kilohertz, megahertz, gigahertz, and RPM.

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Frequency Converter

Convert between Hertz, kilohertz, megahertz, gigahertz, and RPM.

How to Use

Enter frequency

Type the frequency value.

Choose units

Select source and target frequency units.

See the result

Converted frequency appears in real time.

What Is Frequency Converter?

A frequency converter translates between units measuring the number of occurrences of a repeating event per unit time. The Hertz (Hz) is the SI unit, equal to one cycle per second. Kilohertz (kHz), megahertz (MHz), and gigahertz (GHz) are used for audio frequencies, radio waves, and processor clock speeds respectively. RPM (revolutions per minute) measures rotational speed in mechanical systems. Understanding frequency conversions is essential in electronics, telecommunications, audio engineering, and mechanical engineering.

Why Use Our Frequency Converter?

Covers Hz through GHz plus RPM for rotational frequency.
Essential for electronics, audio, and telecommunications.
Real-time bidirectional conversion.
Quick reference for common frequency values.
Completely client-side calculation.

Common Use Cases

Electronics

Convert processor clock speeds between MHz and GHz.

Audio

Work with sampling rates and audio frequency ranges in Hz and kHz.

Telecommunications

Convert radio and wireless frequencies between different scales.

Mechanical Engineering

Convert rotational speeds between RPM and Hz.

Technical Guide

Frequency measures how often a repeating event occurs per unit time. The SI unit Hertz (Hz) equals one cycle per second. • 1 kHz = 1,000 Hz • 1 MHz = 1,000,000 Hz • 1 GHz = 1,000,000,000 Hz • 1 RPM = 1/60 Hz Common frequency ranges: • Human hearing: 20 Hz to 20 kHz • AM radio: 530 kHz to 1,700 kHz • FM radio: 87.5 MHz to 108 MHz • Wi-Fi 2.4 GHz band: 2,400-2,500 MHz • Wi-Fi 5 GHz band: 5,150-5,850 MHz • Modern CPUs: 3-6 GHz The relationship between frequency (f), period (T), and wavelength (λ) is fundamental: f = 1/T, and for electromagnetic waves, c = fλ where c is the speed of light.

Tips & Best Practices

1
Wi-Fi operates at 2.4 GHz = 2,400 MHz and 5 GHz = 5,000 MHz.
2
To convert RPM to Hz, divide by 60. A 3600 RPM motor = 60 Hz.
3
Musical note A4 (concert pitch) = 440 Hz.
4
CPU speeds: 3.5 GHz = 3,500 MHz = 3,500,000,000 Hz.

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Frequently Asked Questions

QHow do I convert MHz to GHz?

Divide MHz by 1,000. For example, 2,400 MHz = 2.4 GHz.

QWhat is the relationship between RPM and Hz?

1 RPM = 1/60 Hz. To convert RPM to Hz, divide by 60. A 3,600 RPM motor spins at 60 Hz.

QWhat frequency range can humans hear?

Typically 20 Hz to 20,000 Hz (20 kHz), though this range decreases with age.

QWhat is the clock speed of a modern CPU?

Typically 3-6 GHz (3,000-6,000 MHz), with some reaching higher through overclocking.

QHow is Hz related to the period of a wave?

Frequency (Hz) is the reciprocal of the period: f = 1/T. A 1 Hz signal has a period of 1 second; a 1 kHz signal has a period of 1 millisecond.

About Frequency Converter

Frequency Converter is a free online tool from FreeToolkit.ai. All processing happens directly in your browser — your data never leaves your device. No registration required. No ads. Just fast, reliable tools.