Frequency Converter
Enter a value to instantly convert between frequency units.
Frequency conversions are most relevant to electronics, audio, radio, and computing — converting between hertz, kilohertz, megahertz, and gigahertz to understand processor clock speeds, radio frequencies, audio sample rates, and signal processing specifications. Because frequency measures cycles per second, and computing/electronics specifications routinely span from single hertz (low-frequency signals) to gigahertz (modern processor clocks) — a range of nine orders of magnitude — the metric prefix conversions in this category get heavy practical use.
1 Hertz = 0.001 Kilohertz
Key Formulas
Hertz → Kilohertz
kHz = Hz × 0.001Kilohertz → Hertz
Hz = kHz × 1000Megahertz → Gigahertz
GHz = MHz × 0.001Gigahertz → Megahertz
MHz = GHz × 1000Popular Conversions
All Frequency Conversions
About Frequency Conversions
History & Background
The hertz, the SI unit of frequency (one cycle per second), is named after Heinrich Hertz, who in the 1880s provided the first experimental confirmation of electromagnetic waves — a discovery that underpins all of radio, television, and wireless communication. Because frequency is one of the most cleanly metric-prefixed units (unlike, say, time itself, where hours and days don't follow powers of 10), conversions between hertz, kilohertz, megahertz, and gigahertz are simple powers-of-1,000 multiplications — among the most straightforward conversions on this site, even though the quantities they describe (from a 50/60 Hz electrical grid to a multi-gigahertz processor) span an enormous range.
How to Use This Converter
Select your starting and target frequency units and enter a value for an instant conversion. Because each step (Hz → kHz → MHz → GHz) is exactly a factor of 1,000, converting in your head is straightforward — moving the decimal point three places per step — but the converter is useful for values that don't fall on round numbers, or for converting between non-adjacent units (e.g., Hz directly to GHz).
Frequently Asked Questions
What does it mean when a processor is rated at, say, 3.5 GHz?
GHz (gigahertz) means billions of cycles per second — a 3.5 GHz processor completes 3.5 billion clock cycles every second. This is a measure of clock speed, not overall performance (which also depends on architecture, number of cores, and instructions per cycle), but it remains a commonly cited specification because higher clock speeds generally allow more operations per second within a given processor design.
Why is electrical grid frequency 50 Hz in some countries and 60 Hz in others?
This is a historical artifact of how different countries' electrical grids were standardized in the early 20th century — there's no technical reason one is superior, though the choice affects the design of frequency-dependent equipment (like older clocks and motors) when traveling between regions with different grid frequencies.
How does frequency relate to wavelength?
Frequency and wavelength are inversely related for waves traveling at a constant speed (like radio waves, which travel at the speed of light): higher frequency means shorter wavelength. This relationship is why radio stations are identified by frequency (e.g., '100 MHz' on the FM dial) — the frequency determines the wavelength, which in turn determines antenna design and propagation characteristics.
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