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Frequency Converter

100% Free

Convert frequency between Hz, kHz, MHz, GHz, THz, RPM, and rad/s — instantly, in your browser, with a full conversion table.

7 Units
Instant
100% Client-Side
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Result
1,000,000,000 Hz
1 GHz = 1,000,000,000 Hz

All conversions from 1 GHz

Hertz
1,000,000,000
Hz
Kilohertz
1,000,000
kHz
Megahertz
1,000
MHz
Terahertz
0.001
THz
Revolutions / min
60,000,000,000
RPM
Radians / sec
6,283,185,300
rad/s

All values are normalised through the hertz (Hz), the SI unit of frequency. 1 kHz = 1,000 Hz, 1 GHz = 1,000,000,000 Hz, 60 RPM = 1 Hz, and 1 Hz = 2π rad/s.

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How to Use

  1. 1 Enter the frequency value you want to convert
  2. 2 Pick the unit you're converting from (e.g. gigahertz)
  3. 3 Pick the unit you want the answer in (e.g. hertz)
  4. 4 Read the converted value and the full conversion table instantly
  5. 5 Use a quick-convert chip or the swap button to change direction

Features

  • 7 frequency units: Hz, kHz, MHz, GHz, THz, RPM, and rad/s
  • Live conversion that updates as you type — no Calculate button
  • Full reference table showing the value in every unit at once
  • One-tap quick-convert presets (Hz→kHz, MHz→GHz, RPM→Hz)
  • Scientific notation for very large or very small results
  • Runs entirely in your browser — nothing is uploaded

Why it Matters

Frequency spans an enormous range, from a few revolutions per minute on a motor to terahertz in optics, and each field has its favourite unit. Converting by hand means juggling factors of a thousand and the 2π that links angular and ordinary frequency. Normalising everything through the hertz removes the slipped-decimal risk.

★★★★★

Use Cases

Electronics & RF

Switch between Hz, kHz, MHz, and GHz for clocks, radios, and signals

Motors & Machinery

Convert RPM to hertz and back when sizing rotating equipment

Physics & Engineering

Move between ordinary frequency and angular frequency in rad/s

Audio & Signals

Express sample rates and tones across kHz and Hz cleanly

What this tool does

The Frequency Converter turns any frequency value from one unit into another — hertz, kilohertz, megahertz, gigahertz, terahertz, RPM, and radians per second. Type a number, choose your units, and the converted value (plus a full reference table) appears instantly.

How it works

Every unit is defined by how many hertz it represents, so the converter does a single multiply-then-divide: your value is converted to hertz, then from hertz into the target unit. Because the hertz (the SI unit of frequency) is the common pivot, all seven units stay perfectly consistent. The logic is a pure function, so the same input always produces the same output.

Privacy

Everything runs locally in your browser. No values are uploaded, logged, or stored.

Frequently Asked Questions

How many hertz are in one gigahertz?
One gigahertz equals 1,000,000,000 hertz (one billion). The SI prefixes step up by factors of a thousand: 1 kHz = 1,000 Hz, 1 MHz = 1,000,000 Hz, 1 GHz = 1,000,000,000 Hz, and 1 THz = 1,000,000,000,000 Hz. The converter normalises every unit through the hertz.
How do I convert RPM to hertz?
Revolutions per minute is a frequency, so divide by 60 to get hertz: 60 RPM = 1 Hz, 3000 RPM = 50 Hz. The converter does this automatically — pick RPM as the from-unit and Hz as the to-unit, or tap the RPM→Hz quick-convert chip.
What is rad/s and how does it relate to hertz?
Radians per second is angular frequency, used in physics and control systems. It relates to ordinary frequency by a factor of 2π: 1 Hz = 2π rad/s ≈ 6.283 rad/s. The converter handles this conversion so you don't have to multiply by 2π by hand.
Why does the result sometimes show scientific notation?
Frequency units span a huge range — from a fraction of a hertz for slow rotation to 10¹² hertz for terahertz signals. When a result is extremely large or extremely small, the converter switches to scientific notation so the value stays readable and precise.
Is my data sent anywhere?
No. The conversion runs entirely in your browser using fixed constants. Nothing you type is uploaded, logged, or stored — refreshing the page clears everything.
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Want to understand the conversions?

Browse all guides →
Frequency Units Explained
frequency units

Frequency Units Explained: Hz, kHz, MHz, GHz, RPM & rad/s

A plain-English guide to frequency units — what a hertz, kilohertz, megahertz, gigahertz, RPM, and rad/s actually measure, how they relate, and how to convert between them.

23 Jun 2026

5 min read

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