Frequency Conversion
Convert between hertz, kilohertz, megahertz, gigahertz and terahertz, and turn a frequency into its period or its wavelength — twenty-four tools covering the whole spectrum from mains hum to terahertz light.
Quick frequency converter
Type in any one of the five boxes and the other four update as you type — no need to pick a direction first.
Values are shown in plain decimal notation. Very large or very small results are written in exponent form so that no digit is lost.
Available Conversions
Select a specific conversion tool to get started
Hz to kHz
Convert hertz to kilohertz for audio work, where the whole range you can hear fits between 0.02 and 20 kHz.
Hz to MHz
Convert hertz to megahertz — the step between a crystal oscillator and the broadcast band, six powers of ten apart.
Hz to GHz
Convert hertz to gigahertz, for reading Wi-Fi channels and radar bands in the unit engineers actually quote them in.
Hz to THz
Convert hertz to terahertz for spectroscopy, where a single hertz is such a small fraction that only exponents keep it readable.
kHz to Hz
Convert kilohertz to hertz for AM broadcast channels, audio band edges and sample rates, where the hertz value is the exact one.
kHz to MHz
Convert kilohertz to megahertz across the shortwave band, where a thousand kilohertz make exactly one megahertz.
kHz to GHz
Convert kilohertz to gigahertz — six powers of ten, which is why a 1 GHz clock counts a million kilohertz a second.
kHz to THz
Convert kilohertz to terahertz for far-infrared and terahertz spectroscopy, with the gap between the units made explicit.
MHz to Hz
Convert megahertz to hertz for FM broadcast frequencies, where 100 MHz is exactly 100,000,000 hertz.
MHz to kHz
Convert megahertz to kilohertz for broadcast plans, walkie-talkie channels and receiver dials, one thousand to one.
MHz to GHz
Convert megahertz to gigahertz for Wi-Fi, Bluetooth and 5G bands, where channel 1 sits at 2412 MHz or 2.412 GHz.
MHz to THz
Convert megahertz to terahertz, and see why a million megahertz is still only one terahertz.
GHz to Hz
Convert gigahertz to hertz to see a processor clock in cycles per second, where 3.5 GHz is 3,500,000,000 Hz.
GHz to kHz
Convert gigahertz to kilohertz for radar and satellite bands, where the kilohertz figure has seven digits.
GHz to MHz
Convert gigahertz to megahertz to match a channel table written in MHz against a radio quoted in GHz.
GHz to THz
Convert gigahertz to terahertz, where a thousand gigahertz make one terahertz and 300 GHz is 0.3 THz.
THz to Hz
Convert terahertz to hertz for terahertz astronomy and molecular spectroscopy, at the top of the usable spectrum.
THz to kHz
Convert terahertz to kilohertz for spectroscopy readouts, where the kilohertz value runs to twelve digits.
THz to MHz
Convert terahertz to megahertz for terahertz imaging and security scanning, one million to one.
THz to GHz
Convert terahertz to gigahertz, the step that turns 0.3 THz into the 300 GHz a radar datasheet quotes.
Frequency to Period
Turn a frequency into its period with T = 1/f, auto-scaled to seconds, milliseconds, microseconds or nanoseconds.
Period to Frequency
Turn a period into its frequency, the calculation behind 555 timers, PWM settings and RC oscillators.
Frequency to Wavelength
Turn a frequency into its wavelength with λ = c/f, auto-scaled — 2.4 GHz comes out as 124.9 mm, the size an antenna has to be.
Wavelength to Frequency
Turn a wavelength into its frequency, so a 2 metre amateur band or a 3 metre FM carrier becomes a number in MHz.
How to Use This Tool
Select Conversion Type
Choose the specific conversion you need from the list above
Enter Your Values
Input the value you want to convert in the designated field
Get Instant Results
View the converted result immediately with high accuracy