MHz to GHz
Convert megahertz to gigahertz instantly — type a value and read the result, with the exact formula shown.
Reviewed by the CalcCafe editorial team · Last updated 1 July 2026 · How we test our tools
Example
1 MHz = 0.001 GHz, 5 MHz = 0.005 GHz, 10 MHz = 0.01 GHz.
Common conversions: megahertz to gigahertz
Quick reference for the MHz → GHz values you are most likely to need, computed with the exact factor the converter above uses. It includes the specific values people most often look up (800 MHz, 3,000 MHz, 1,000 MHz, 100 MHz, 2,000 MHz).
| Megahertz (MHz) | Gigahertz (GHz) |
|---|
| 1 MHz | 0.001 GHz |
| 2 MHz | 0.002 GHz |
| 2.5 MHz | 0.0025 GHz |
| 3 MHz | 0.003 GHz |
| 5 MHz | 0.005 GHz |
| 10 MHz | 0.01 GHz |
| 15 MHz | 0.015 GHz |
| 20 MHz | 0.02 GHz |
| 25 MHz | 0.025 GHz |
| 30 MHz | 0.03 GHz |
| 40 MHz | 0.04 GHz |
| 50 MHz | 0.05 GHz |
| 60 MHz | 0.06 GHz |
| 70 MHz | 0.07 GHz |
| 75 MHz | 0.075 GHz |
| 80 MHz | 0.08 GHz |
| 90 MHz | 0.09 GHz |
| 100 MHz | 0.1 GHz |
| 150 MHz | 0.15 GHz |
| 200 MHz | 0.2 GHz |
| 250 MHz | 0.25 GHz |
| 500 MHz | 0.5 GHz |
| 800 MHz | 0.8 GHz |
| 1,000 MHz | 1 GHz |
| 2,000 MHz | 2 GHz |
| 3,000 MHz | 3 GHz |
Gigahertz to Megahertz
| Gigahertz (GHz) | Megahertz (MHz) |
|---|
| 1 GHz | 1,000 MHz |
| 5 GHz | 5,000 MHz |
| 10 GHz | 10,000 MHz |
| 50 GHz | 50,000 MHz |
| 100 GHz | 100,000 MHz |
How it works
Gigahertz = Megahertz × 0.001. Every value is converted through a single hertz base unit using internationally defined conversion factors, so any from/to pair stays consistent.
Good to know
Converting megahertz to gigahertz comes up constantly when you compare hardware specs. A CPU advertised at "3500 MHz" is the same chip as one listed at "3.5 GHz," and a Wi-Fi radio described as "5000 MHz" is just the familiar 5 GHz band written in smaller units. The conversion lets you line up RAM speeds, processor clocks, radio bands, and oscillator ratings that vendors quote in different units on the same spec sheet.
Both units are part of the metric (SI) system, so there is no imperial-versus-metric mismatch here — only a shift in prefix. "Mega" means one million hertz and "giga" means one billion hertz, so a gigahertz is exactly 1,000 times larger than a megahertz. Because both are decimal SI steps, the factor is always a clean power of ten rather than an awkward number like 2.54.
The rule of thumb is simply "move the decimal point three places to the left." 2400 MHz becomes 2.4 GHz; 866 MHz becomes 0.866 GHz; 100 MHz becomes 0.1 GHz. If you can divide by 1,000 in your head, you never need a calculator for this one.
The most common mistake is slipping a factor of 1,000 in the wrong direction — multiplying when you should divide. Going from the smaller unit (MHz) to the larger unit (GHz) the number must get smaller, so 2400 MHz is 2.4 GHz, never 2,400,000 GHz. Also watch trailing precision: rounding 1499 MHz to "1.5 GHz" is fine for casual reading but can hide a real 1 MHz difference that matters in tuning a radio or matching a memory timing.
Frequently asked questions
How do you convert megahertz to gigahertz?
Multiply the number of megahertzs by 0.001 to get gigahertzs. For example, 1 MHz = 0.001 GHz.
What is 1 megahertz in gigahertzs?
1 megahertz equals 0.001 gigahertzs (1 MHz = 0.001 GHz).
How many megahertzs are in 1 gigahertz?
There are 1,000 megahertzs in 1 gigahertz.
Is this converter free and private?
Yes. It runs entirely in your browser, so your inputs never leave your device, there is no sign-up, and it works offline once loaded.
Are the conversions exact?
Conversions use internationally defined factors and are exact where the definitions are exact (for example, 1 inch = 2.54 cm). Displayed results are rounded for readability.
People also ask
How many GHz is 1000 MHz?
1000 MHz equals exactly 1 GHz, because there are 1,000 megahertz in every gigahertz.
What is 2400 MHz in GHz?
2400 MHz is 2.4 GHz. You divide by 1,000, which is the same as moving the decimal point three places to the left.
Is 5000 MHz the same as 5 GHz?
Yes. 5000 MHz and 5 GHz are identical frequencies, which is why the Wi-Fi 5 GHz band is sometimes listed as 5000 MHz.
Why are CPU speeds shown in GHz but some chips in MHz?
Modern processors run in the billions of cycles per second, so GHz is more readable (3.5 GHz instead of 3500 MHz). Older or low-power chips, and many memory modules, are still quoted in MHz because their clocks fall below 1 GHz or vendors keep legacy labeling.
How do I convert MHz to GHz without a calculator?
Just divide the MHz value by 1,000, or move the decimal point three places to the left. For example, 800 MHz becomes 0.8 GHz.
Is MHz bigger or smaller than GHz?
MHz is smaller. One gigahertz equals 1,000 megahertz, so a GHz figure will always be a smaller-looking number than the same frequency in MHz.
What is 100 MHz in GHz?
100 MHz equals 0.1 GHz, since you divide 100 by 1,000.
What is 1 GHz equal to?
One gigahertz is one billion cycles per second, or 1,000,000,000 Hz. That is the same as 1,000 MHz or 1,000,000 kHz, so a 1 GHz processor completes a billion clock ticks every second. Each step up the ladder from Hz to kHz to MHz to GHz is a factor of 1,000.
What does MHz stand for?
MHz stands for megahertz, which is one million hertz, or one million cycles per second. The 'M' is the metric prefix mega (10^6) and 'Hz' honors the physicist Heinrich Hertz. Radio stations, RAM speeds, and older CPU clocks are commonly quoted in MHz, and 1,000 MHz equals 1 GHz.
What frequency is 1 Hz?
One hertz is one complete cycle or event per second, the base unit of frequency. A pendulum that swings back and forth once every second has a frequency of 1 Hz, and a 1 Hz signal has a period of exactly one second. It is one millionth of a megahertz and one billionth of a gigahertz.
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Sources & references
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