Frequency Converter
Convert between 10 frequency units instantly — enter a value in any unit to see all others updated simultaneously in the conversion table. Supports Hz, kHz, MHz, GHz, THz (SI), RPM, RPS, rad/s (rotational), and CPM, BPM (period-based). Quick-convert buttons for Hz ↔ kHz, RPM ↔ Hz, and Hz → rad/s. Free, private, and no signup required.
Enter a frequency value, choose your source and target units, and click Convert for the primary result — or see all 10 units updated instantly in the conversion table below. Covers SI frequency units (Hz to THz), rotational units (RPM, rad/s), and period-based units (BPM, CPM). All calculations run locally in your browser.
Quick Convert:
All Units — Conversion Table
Updates instantly as you type
About This Converter:
- All conversions use Hertz (Hz) as the base unit.
- RPM and CPM: 1 RPM = 1/60 Hz. RPM and CPM are equivalent — both measure cycles per minute.
- rad/s: Angular frequency ω = 2π × f (Hz). 1 Hz = 2π rad/s ≈ 6.2832 rad/s.
- BPM: Beats per minute — same conversion as CPM/RPM (1 BPM = 1/60 Hz).
- All calculations run locally in your browser — your data is never sent to any server.
Why Use Our Frequency Converter?
10 Frequency Units — SI, Rotational & Period-Based
Convert between Hz, kHz, MHz, GHz, THz (SI frequency), RPM, RPS, rad/s (rotational), and CPM, BPM (period-based) — all in a single tool. Covers audio frequencies, radio frequencies, processor clock speeds, motor speeds, and musical tempos.
All-at-Once Conversion Table
Enter a frequency value in any unit and instantly see all 10 units updated simultaneously in the reactive conversion table — no Convert button needed for the table. Perfect for comparing frequencies across SI, rotational, and period-based unit systems at a glance.
Completely Private & Secure
All frequency conversions run entirely in your browser. Your values are never sent to any server, stored in a database, or tracked in any way — 100% private when you use our frequency converter online.
No Installation Required
Use our free frequency converter directly in your browser — no downloads, no plugins, no account needed. Quick-convert buttons for the 6 most popular conversions (Hz ↔ kHz, RPM ↔ Hz, Hz → rad/s) let you get results in one click.
Common Use Cases for Frequency Converter
Radio & Wireless Communications
Engineers and radio enthusiasts use the frequency converter to convert between Hz, kHz, MHz, and GHz for radio frequency planning. AM radio operates at 530–1700 kHz, FM radio at 87.5–108 MHz, and Wi-Fi at 2.4 GHz and 5 GHz.
Processor & Clock Speed
Computer engineers and enthusiasts use the frequency converter to compare CPU clock speeds. Modern processors run at 3–5 GHz, while older systems ran at MHz. The converter makes it easy to compare clock speeds across generations.
Audio Engineering & Acoustics
Audio engineers use the frequency converter to work with audio frequencies. Human hearing ranges from 20 Hz to 20 kHz. Converting between Hz and kHz is common when setting equaliser frequencies, crossover points, and filter cutoffs.
Motor & Engine Speed (RPM)
Mechanical engineers and automotive technicians use the frequency converter to convert between RPM and Hz or rad/s. Motor speed in RPM must often be converted to Hz for electrical frequency calculations or to rad/s for torque and power calculations.
Music & Tempo (BPM)
Musicians and music producers use the frequency converter to convert BPM (beats per minute) to Hz for synchronising audio effects with tempo. A 120 BPM track has a beat frequency of 2 Hz — useful for setting delay times and LFO rates.
Physics & Engineering Education
Students and educators use the frequency converter to convert between Hz and rad/s for oscillation and wave problems. Angular frequency ω = 2π × f is fundamental in AC circuit analysis, simple harmonic motion, and wave mechanics.
Understanding Frequency Units
What is a Frequency Converter?
A frequency converter converts measurements of how often a periodic event occurs per unit of time between different units. The SI unit of frequency is the Hertz (Hz), defined as one cycle per second. Frequency appears in many domains: radio waves (MHz, GHz), audio (Hz, kHz), processor speeds (GHz), motor speeds (RPM), and musical tempo (BPM). Our browser-based frequency converter supports 10 units across SI, rotational, and period-based systems with a reactive all-at-once conversion table and quick-convert buttons.
How Our Frequency Converter Works
- Enter a Frequency Value: Type any frequency value in the input field. The all-at-once conversion table updates instantly as you type — no button click needed. Use the quick-convert buttons to set the most popular unit pairs in one click.
- Select From and To Units: Choose your source unit from the From dropdown and your target unit from the To dropdown. Use the swap button (⇄) to reverse the conversion direction instantly.
- Instant Browser-Based Conversion: Click Convert for the primary result card. All conversions use Hertz (Hz) as the base unit and run entirely in your browser — your data is never sent to any server.
Frequency Units Explained
- Hertz (Hz): The SI unit of frequency — 1 Hz = 1 cycle per second. Named after Heinrich Hertz. Used for audio, electrical, and wave frequencies. 1 kHz = 1,000 Hz; 1 MHz = 1,000,000 Hz; 1 GHz = 10⁹ Hz.
- RPM (Revolutions per minute): Used for rotational speed of motors, engines, and turbines. 1 RPM = 1/60 Hz ≈ 0.01667 Hz. A car engine at 3,000 RPM = 50 Hz.
- rad/s (Radians per second): Angular frequency ω = 2π × f. Used in physics and engineering for oscillation and AC circuit analysis. 1 Hz = 2π rad/s ≈ 6.2832 rad/s.
- BPM (Beats per minute): Used in music for tempo. 1 BPM = 1/60 Hz. A 120 BPM track has a beat frequency of 2 Hz. BPM and CPM are numerically identical — both equal cycles per minute.
Common Frequency Reference Points
Human hearing: 20 Hz – 20 kHz. Middle A (concert pitch): 440 Hz. AM radio: 530–1,700 kHz. FM radio: 87.5–108 MHz. Wi-Fi 2.4 GHz band: 2,400–2,484 MHz. Wi-Fi 5 GHz band: 5,150–5,850 MHz. Modern CPU clock speeds: 3–5 GHz. Visible light: 430–770 THz.
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Frequently Asked Questions About Frequency Converter
A frequency converter converts measurements of periodic events between different units — Hz, kHz, MHz, GHz, THz, RPM, rad/s, BPM, and more. Our frequency converter supports 10 units with a reactive all-at-once conversion table and quick-convert buttons — all running locally in your browser with no signup required.
Divide Hz by 1,000 to get kHz. For example, 5,000 Hz ÷ 1,000 = 5 kHz. To convert kHz to Hz, multiply by 1,000. Use the quick-convert button "Hz → kHz" in the frequency converter for instant results.
Divide RPM by 60 to get Hz. For example, 3,000 RPM ÷ 60 = 50 Hz. To convert Hz to RPM, multiply by 60. A motor running at 3,000 RPM completes 50 full revolutions per second.
Multiply Hz by 2π (≈ 6.2832) to get rad/s. For example, 50 Hz × 2π ≈ 314.16 rad/s. This is the angular frequency ω = 2πf, fundamental in AC circuit analysis and oscillation problems.
Both measure frequency (cycles per unit time), but in different time units. Hz = cycles per second; RPM = revolutions per minute. 1 Hz = 60 RPM. RPM is used for mechanical rotation (motors, engines); Hz is used for electrical and wave frequencies.
BPM (beats per minute) and Hz (cycles per second) both measure frequency but in different time units. 1 BPM = 1/60 Hz. A 120 BPM music track has a beat frequency of 2 Hz. BPM and CPM (cycles per minute) are numerically identical.
Middle A (A4, concert pitch) is 440 Hz. This is the international standard tuning reference for musical instruments. In kHz, it is 0.44 kHz. The frequency converter shows all equivalent values instantly.
Absolutely. All frequency conversions run entirely in your browser. Your values are never sent to any server, stored in a database, or tracked. Everything stays completely private on your device.
Yes. The frequency converter is 100% free with no signup required, no premium tier, no usage quotas, and no ads blocking the interface. Convert frequencies as many times as you need, directly in your browser.