Unit Converters
Frequency Converter
Convert frequency units: hertz, kilohertz, megahertz, gigahertz, RPM, and more. Perfect for electronics, audio, radio, computing, and mechanical engineering.
Use Frequency Converter to get instant results without uploads or sign-ups. Everything runs securely in your browser for fast, reliable output.
Your results will appear here.
About this tool
Frequency conversion is essential in electronics, telecommunications, audio engineering, computing, and mechanical engineering. Frequency measures how often a repeating event occurs per unit time (cycles per second). Different fields use different frequency scales: audio uses Hz to kHz, radio uses MHz to GHz, computer processors are rated in GHz, and mechanical rotation is measured in RPM (revolutions per minute). Understanding these conversions helps compare specifications and design compatible systems.
Our Frequency Converter handles all common frequency units with precision. Convert between SI units (hertz and its multiples: kHz, MHz, GHz, THz), mechanical units (RPM - revolutions per minute, RPS - revolutions per second), and period-based measurements. The calculator uses exact conversion factors ensuring accuracy for engineering specifications, system design, and troubleshooting.
Frequency conversions are crucial in many applications: understanding radio station frequencies (FM radio is 88-108 MHz), comparing CPU clock speeds (modern processors run at 2-5 GHz), analyzing audio frequencies (human hearing is 20 Hz to 20 kHz), designing electronic circuits, working with AC power (60 Hz in US, 50 Hz in Europe), calculating motor speeds, and understanding wireless technologies (WiFi at 2.4 GHz and 5 GHz).
The converter is valuable for electronics engineers designing circuits, radio enthusiasts working with transceivers, audio engineers mixing sound, computer technicians comparing processors, mechanical engineers calculating RPM, telecommunications professionals working with wireless systems, and students learning physics or electrical engineering. Accurate frequency conversions ensure proper equipment selection, compatibility, and system performance across different technologies and standards.
Usage examples
CPU Speed
Convert 3.5 GHz processor to MHz
3.5 GHz = 3,500 MHz
FM Radio
Convert 101.5 MHz to hertz
101.5 MHz = 101,500,000 Hz
Motor Speed
Convert 3,600 RPM to hertz
3,600 RPM = 60 Hz
Audio Frequency
Convert 440 Hz (A note) to kilohertz
440 Hz = 0.44 kHz
WiFi Frequency
Convert 5 GHz to megahertz
5 GHz = 5,000 MHz
How to use
- Enter the frequency value you want to convert.
- Select the unit you're converting FROM (e.g., MHz).
- Select the unit you're converting TO (e.g., GHz).
- Click "Convert" to see the result instantly.
- The converter shows precise results for technical specifications.
- Useful for radio frequencies, CPU speeds, audio work, and mechanical systems.
Benefits
- Convert between all common frequency units instantly
- Accurate conversions for technical specifications
- Essential for electronics and circuit design
- Useful for radio and wireless communication work
- Helps compare computer processor speeds
- Perfect for audio engineering and music
- Simplifies mechanical rotation calculations
- Educational tool for physics and engineering students
- Free alternative to manual conversion calculations
- Prevents specification misunderstandings
- Mobile-friendly for field and lab use
- Supports both electronic and mechanical frequency units
FAQs
What is hertz (Hz)?
Hertz (Hz) is the SI unit of frequency, measuring cycles per second. 1 Hz means one complete cycle per second. Named after Heinrich Hertz, it's used for everything from audio (440 Hz = musical A note) to processors (3 GHz CPU = 3 billion cycles/second). Common multiples: kHz (1,000 Hz), MHz (1 million Hz), GHz (1 billion Hz).
How do I convert RPM to Hz?
Divide RPM by 60 to get Hz (or multiply Hz by 60 to get RPM). For example, 3,600 RPM = 3,600 ÷ 60 = 60 Hz. This converts rotational speed (revolutions per minute) to frequency (cycles per second). Useful for motors, engines, and rotating machinery where both units are common.
What frequency range is used for radio?
AM radio: 540-1600 kHz. FM radio: 88-108 MHz. TV broadcasts: 54-890 MHz. Cell phones: 700 MHz-2.6 GHz. WiFi: 2.4 GHz and 5 GHz. Bluetooth: 2.4 GHz. GPS: 1.5 GHz. Different frequencies have different propagation characteristics—lower frequencies travel farther, higher frequencies carry more data.
What is the relationship between frequency and wavelength?
Frequency and wavelength are inversely related: wavelength = speed of light / frequency. Higher frequency means shorter wavelength. For example, 100 MHz has a 3-meter wavelength, while 1 GHz has a 30 cm wavelength. This matters for antenna design—antennas are often sized relative to wavelength (e.g., quarter-wave or half-wave).
Why are CPU speeds measured in GHz?
Modern CPUs perform billions of cycles per second, so gigahertz (GHz) is the convenient unit. A 3.5 GHz processor completes 3.5 billion clock cycles per second. Each cycle can execute one or more instructions. Higher frequency generally means faster processing, though architecture, cores, and efficiency also matter significantly.
What is the frequency of AC electricity?
Most of the world uses 50 Hz AC power (Europe, Asia, Africa, Australia). North America and parts of South America use 60 Hz. This means the voltage alternates direction 50 or 60 times per second. The frequency affects motor speeds, transformer design, and some appliances. It's why some devices need 50/60 Hz switches or universal power supplies.
What is the human hearing frequency range?
Humans typically hear from 20 Hz (deep bass) to 20,000 Hz or 20 kHz (high treble), though high-frequency hearing decreases with age. Musical instruments span most of this range: bass guitar fundamental frequencies start around 40 Hz, middle C is 262 Hz, and cymbals reach above 10 kHz. Audio equipment specifications often reference 20 Hz-20 kHz.
What does period mean in relation to frequency?
Period is the time for one complete cycle, measured in seconds. It's the reciprocal of frequency: period = 1/frequency. For example, 60 Hz has a period of 1/60 = 0.0167 seconds (16.7 milliseconds). AC power at 60 Hz completes one full sine wave every 16.7 ms. Higher frequency means shorter period.
Related tools
View all toolsAngle Converter
Convert angle units: degrees, radians, gradians, turns, arcminutes, arcseconds. Perfect for mathematics, engineering, navigation, astronomy, and trigonometry.
Unit ConvertersArea Converter
Convert area units: square feet, square meters, acres, hectares, square yards, square miles, and more. Perfect for real estate, construction, land measurement, and international conversions.
Unit ConvertersCooking Measurement Converter
Convert cooking measurements: cups, tablespoons, teaspoons, milliliters, ounces, and more. Perfect for recipes, baking, international cooking, and meal preparation.
Unit Converters