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Gigahertz to Megahertz

1 Gigahertz (GHz) = 1,000Megahertz (MHz)

By KAMP Inc. / UnitOwl · Last reviewed:

Result
1,000 MHz
1 GHz = 1,000 MHz
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How to Convert GHz to MHz?

One gigahertz (GHz) equals 1,000 megahertz (MHz). To convert GHz to MHz, multiply the GHz value by 1,000. This reverse conversion is needed when configuring hardware that accepts input in MHz, comparing detailed technical specifications, or working with tools that display frequencies in MHz. Overclocking software, BIOS settings, and oscilloscope readings often use MHz for precision. If you are adjusting a CPU overclock from 4.2 GHz to 4.35 GHz, the BIOS might need the input as 4,350 MHz. Similarly, wireless channel planning tools and spectrum analyzers typically work in MHz for the granularity needed to distinguish individual channels within a frequency band. It is also useful whenever a coarse GHz spec needs to be turned into a precise engineering number. A processor advertised at 4.7 GHz may be configured in 4,700 MHz steps, and a wireless band described as 5.9 GHz may appear in planning documents as 5,925 MHz. This is why technicians routinely convert back to MHz before entering values. That precision matters when settings change in small steps.

How to Convert Gigahertz to Megahertz

  1. Start with your frequency in gigahertz (GHz).
  2. Multiply the GHz value by 1,000 to get megahertz (MHz).
  3. The result is your frequency in MHz.
  4. Simply move the decimal point three places to the right.
  5. For example, 2.4 GHz = 2,400 MHz, 5.8 GHz = 5,800 MHz.

Real-World Examples

A CPU turbo clock is 5.2 GHz. What MHz value do you enter in BIOS?
5.2 x 1,000 = 5,200 MHz. BIOS overclocking interfaces often use MHz.
Your 2.4 GHz Wi-Fi band spans what frequency range in MHz?
2.4 GHz = 2,400 MHz. The 2.4 GHz band spans from 2,400 to 2,483.5 MHz.
A 5G NR band operates at 3.5 GHz. What is that in MHz for the spectrum allocation table?
3.5 x 1,000 = 3,500 MHz. The n78 band spans 3,300-3,800 MHz.
A DDR4 module is marketed as 3.2 GHz effective speed.
3.2 x 1,000 = 3,200 MHz. DDR4-3200 is one of the most common memory specifications.
Bluetooth operates around 2.402 GHz on its first classic channel.
2.402 x 1,000 = 2,402 MHz. Radio tools often display the Bluetooth band in MHz even when marketing calls it the 2.4 GHz band.

Quick Reference

Gigahertz (GHz)Megahertz (MHz)
11,000
22,000
33,000
55,000
1010,000
1515,000
2020,000
2525,000
5050,000
7575,000
100100,000
250250,000
500500,000
1,0001,000,000

History of Gigahertz and Megahertz

The MHz era of computing dominated the 1990s. Intel 486 processors ran at 25-100 MHz, Pentium chips reached 60-200 MHz, and the Pentium III and AMD Athlon broke the 1,000 MHz (1 GHz) barrier in 2000. This milestone was so significant that it made front-page news. Since then, GHz has been the standard marketing unit for CPU speed, though the MHz measurement remains in technical use. In wireless communications, MHz was the standard unit throughout the development of cellular networks (800 MHz, 900 MHz, 1800 MHz bands) and remains dominant in regulatory spectrum allocation documents.

Common Mistakes to Avoid

  • Dividing by 1,000 instead of multiplying. This converts MHz to GHz (the opposite direction). GHz values should always be smaller numbers than their MHz equivalents.
  • Confusing GHz with Gbps. GHz measures frequency (cycles per second), while Gbps measures data transfer rate (bits per second). A 3.5 GHz processor does not transfer data at 3.5 Gbps — the relationship between clock speed and data rate depends on architecture.
  • Not accounting for the difference between base clock and effective/transfer rate in memory. DDR (Double Data Rate) memory marketed as "3,200 MHz" actually has a 1,600 MHz base clock that transfers data on both clock edges.
  • Rounding away useful precision when converting channel-center or band-edge values. 5.925 GHz should be written as 5,925 MHz, not loosely as 5,900 MHz, when the exact allocation matters.
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Frequently Asked Questions

Why do BIOS settings use MHz instead of GHz?
BIOS and overclocking tools use MHz because it provides integer precision. Setting a CPU to 4,350 MHz is more precise than 4.35 GHz (which might round differently). When fine-tuning overclocks by 50-100 MHz increments, the MHz unit avoids decimal places.
Is memory frequency in MHz the same as CPU frequency in MHz?
They are both measured in MHz/GHz but represent different things. CPU MHz is the clock speed at which the processor executes instructions. Memory MHz (for DDR) is the effective data transfer rate, which is 2x the actual clock frequency due to double data rate technology.
How do radio frequency bands relate to GHz and MHz?
Radio spectrum is divided into bands. VHF (30-300 MHz): FM radio, aviation. UHF (300-3,000 MHz): TV, cellular, Wi-Fi 2.4 GHz. SHF (3-30 GHz): Wi-Fi 5/6 GHz, 5G, satellite. Each band uses MHz or GHz depending on which gives more convenient numbers.
How many MHz are in the 5 GHz Wi-Fi band?
Nominally, 5 GHz means frequencies around 5,000 MHz. In practice, common Wi-Fi channels in that band sit at center frequencies such as 5,180 MHz, 5,745 MHz, and similar values depending on the channel and region.
How many MHz is 2.4 GHz?
2.4 GHz equals 2,400 MHz. That is why the 2.4 GHz Wi-Fi band is often described more precisely as frequencies around 2,400 to 2,483.5 MHz.
Quick Tip

For hardware configuration: when a spec says GHz, multiply by 1,000 for the MHz value needed in BIOS or configuration tools. The most common values to know: 2.4 GHz = 2,400 MHz (Wi-Fi), 3.2 GHz = 3,200 MHz (DDR4), 4.0 GHz = 4,000 MHz (common CPU base), 5.0 GHz = 5,000 MHz (Wi-Fi/CPU turbo). These are the numbers you will encounter most often.

Sources & References