Yes, GHz is bigger than MHz. One gigahertz (GHz) equals 1,000 megahertz (MHz), so any measurement in GHz represents a frequency one thousand times larger than the same number in MHz. This difference matters in everyday technology, from the processor in your computer to the Wi-Fi signal in your home.
How GHz and MHz Relate
Both units measure frequency, which is the number of times a signal cycles per second. The base unit is the hertz (Hz), equal to one cycle per second. The prefixes “mega” and “giga” are standard metric multipliers defined by the International System of Units (SI):
- 1 MHz = 1 million hertz (10⁶ Hz)
- 1 GHz = 1 billion hertz (10⁹ Hz)
That makes 1 GHz exactly 1,000 times larger than 1 MHz. To convert, multiply GHz by 1,000 to get MHz, or divide MHz by 1,000 to get GHz. So 2.4 GHz is the same as 2,400 MHz, and 800 MHz is 0.8 GHz.
These two units sit in the middle of a broader frequency ladder. Below MHz you’ll find kilohertz (kHz), where 1 kHz equals 1,000 Hz. Above GHz sits terahertz (THz), where 1 THz equals 1,000 GHz. Each step up the ladder multiplies by a factor of 1,000.
Where You Encounter MHz and GHz
FM radio stations broadcast in the MHz range, typically between 88 and 108 MHz. Older cordless phones, some two-way radios, and basic Bluetooth devices also operate in the hundreds of MHz. When frequencies are relatively low like this, the signals tend to travel farther and pass through walls and other solid objects more easily.
GHz frequencies show up in newer, faster technologies. Your Wi-Fi router likely offers a 2.4 GHz band and a 5 GHz band, and newer routers add a 6 GHz band. Computer processors are rated in GHz too. A modern CPU running at 4.5 GHz is completing 4.5 billion clock cycles every second. Cellular networks also use GHz frequencies: most current 5G signals operate below 6 GHz, though future 5G expansions will push into the millimeter-wave range above 24 GHz for even faster data speeds.
Why Higher Frequency Means Shorter Range
Frequency and wavelength have an inverse relationship. As frequency goes up, wavelength gets shorter. A 2.4 GHz Wi-Fi signal has a wavelength of about 12.5 centimeters, while a signal at 900 MHz stretches to roughly 33 centimeters. This physical difference changes how the signal behaves in the real world.
Lower frequencies (in the MHz range) produce longer wavelengths that pass through walls, floors, and foliage more effectively. That’s why the 2.4 GHz Wi-Fi band covers a larger area in your home than the 5 GHz band, and why FM radio signals can reach you dozens of miles from the broadcast tower. Higher GHz frequencies struggle to penetrate solid objects, so their usable range shrinks. The tradeoff is speed: higher frequencies can carry more data per second. The 5 GHz Wi-Fi band is noticeably faster than 2.4 GHz for streaming and gaming, and the 6 GHz band is faster still, capable of handling hundreds of devices simultaneously in high-density environments.
Quick Conversion Reference
- 0.1 GHz = 100 MHz
- 0.9 GHz = 900 MHz
- 2.4 GHz = 2,400 MHz
- 5 GHz = 5,000 MHz
- 6 GHz = 6,000 MHz
If you’re comparing specs on a router, phone, or processor and one lists MHz while another lists GHz, just divide the MHz number by 1,000. A device rated at 3,500 MHz is identical in clock speed to one rated at 3.5 GHz.