Frequency Converter

Convert between hertz, kilohertz, megahertz, gigahertz, terahertz, and RPM instantly.

Common Frequency Conversions
FromToResult
1 MHzHz1,000,000 Hz
1 GHzMHz1,000 MHz
1 kHzHz1,000 Hz
3,000 MHzGHz3 GHz
1 THzGHz1,000 GHz
60 RPMHz1 Hz
3,600 RPMHz60 Hz
1 HzRPM60 RPM

Frequently Asked Questions

The hertz (Hz) is the SI unit of frequency, defined as one cycle per second. Named after physicist Heinrich Hertz, it measures how many times a periodic event repeats per second. Common examples: AC power grids run at 50 or 60 Hz; CPU clocks at GHz; sound waves at Hz–kHz; radio waves at MHz–GHz.

Divide RPM by 60 to get Hz. 1 RPM = 1/60 Hz ≈ 0.01667 Hz. For example, a motor spinning at 3,000 RPM operates at 50 Hz (3000/60 = 50). This is why 50 Hz mains power corresponds to motors typically spinning at 3,000 or 1,500 RPM depending on the number of poles.

One terahertz (THz) = 10¹² Hz = 1 trillion cycles per second. THz radiation lies between microwave and infrared on the electromagnetic spectrum. It is used in security scanners, medical imaging, and material analysis. Visible light frequencies are hundreds of terahertz (400–790 THz).

WiFi uses 2.4 GHz and 5 GHz bands. The newer WiFi 6E also uses the 6 GHz band. Bluetooth operates at 2.4 GHz. 4G LTE uses 700 MHz – 2.6 GHz, and 5G uses sub-6 GHz bands as well as mmWave bands up to 86 GHz for very high data rates in dense areas.

How It Works

Enter Frequency

Type any frequency value. The hertz (Hz) is used as the SI base unit for all calculations.

Select Units

Choose from Hz to THz (SI decimal prefixes) plus RPM for rotational applications. Swap direction instantly.

Get Result

Conversion is immediate with the exact factor shown. Use the reference table for common frequency equivalents.

Common Use Cases

Computing & Electronics

Convert CPU clock speeds between MHz and GHz, and understand oscillator frequencies for microcontroller and circuit design projects.

Radio & Wireless

Convert radio frequencies between kHz, MHz, and GHz for understanding AM/FM bands, WiFi channels, and cellular frequency allocations.

Audio & Acoustics

Convert audio frequencies in Hz and kHz for speaker design, equalizer settings, and understanding the human hearing range (20 Hz – 20 kHz).

Motors & Machinery

Convert between Hz and RPM for motor speed calculations, VFD drive settings, and mechanical equipment operating frequency specifications.

Medical Imaging

Convert ultrasound frequencies between MHz and GHz for medical device specifications, and understand terahertz imaging applications.

Physics Education

Convert between frequency, period, and angular frequency for wave mechanics, electromagnetic spectrum, and oscillation problems.

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