Frequency Converter
Turn any frequency into a different unit — hertz, kilohertz, megahertz, gigahertz, terahertz, and rpm — using exact, published factors.
Hertz-based
Every unit is a fixed multiple of the hertz, so the converter pivots through hertz for one consistent rule.
Display rounding
Results are shown to six decimal places, so very large or very small conversions may round the last digit.
What is a frequency converter?
One value, any unit
A frequency converter changes a reading from one unit into another — GHz to MHz, MHz to GHz, hertz to kilohertz, rpm to hertz, and back. It works by translating every value through a single shared pivot, the hertz (Hz), so any pair of units converts with one consistent rule. This tool covers the six units used in electronics, audio, radio, computing, and rotation: hertz, kilohertz, megahertz, gigahertz, terahertz, and revolutions per minute.
Frequency units share a zero point, so converting is purely multiplicative — scale by the factor in, then by the factor out.
result = value × (Hz per from-unit) ÷ (Hz per to-unit)Because the hertz is the SI unit of frequency, each unit has a fixed number of hertz: 1 kHz is 1000 Hz, 1 MHz is 1,000,000 Hz, 1 GHz is 1,000,000,000 Hz, and one rpm is 1/60 Hz. The converter turns your value into hertz first, then into the unit you want — so a single rule handles every direction.
Suppose you want to convert 1 GHz into MHz.
Convert to hertz
Multiply by the GHz factor: 1 × 1,000,000,000 = 1,000,000,000 Hz.Convert out to MHz
Divide by the MHz factor: 1,000,000,000 ÷ 1,000,000 = 1000.Read the result
1 GHz converts to 1000 MHz — the clock speed of a typical entry-level CPU.
Frequency conversion is a simple ratio, so the everyday anchors are easy to remember: each SI step — kHz, MHz, GHz, THz — multiplies by 1000, so 1 GHz = 1000 MHz = 1,000,000 kHz. Hertz counts cycles per second, so a 50 Hz mains supply alternates 50 times a second, FM radio broadcasts around 88–108 MHz, Wi-Fi and CPU clocks sit in the GHz range, and visible light reaches hundreds of THz. Revolutions per minute relate to hertz by a factor of 60, because rpm counts turns per minute while hertz counts cycles per second: 1 Hz = 60 rpm. If a converted number looks far off by a factor of 1000, check that the from-unit and to-unit are not swapped — the swap arrow flips them in one click.
The arithmetic is exact; the limits are about precision and what frequency means.
Precision and rotational speed
The SI prefixes (kilo, mega, giga, tera) are exact powers of ten, and rpm is exactly 1/60 Hz, so the factors are not estimates. Results are rounded to six decimal places, so conversions with long decimal tails — such as a value in rpm expressed in GHz — may lose the last digit. Treat rpm as a frequency of complete cycles: it works for steady rotational speed, but it does not capture angular velocity in radians or any phase information.