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To convert from hertz (Hz) to gigahertz (GHz), use the following formula:
gigahertz (GHz)
= 1109× hertz (Hz)
= 10-9× hertz (Hz)
Let's convert 5 hertz (Hz) to gigahertz (GHz).
Using the formula:
5 × 10-9 = 5× 10-9
Therefore, 5 hertz (Hz) is equal to 5× 10-9 gigahertz (GHz).
How many hertz are in one gigahertz? One gigahertz (GHz) contains 109 hertz (Hz) — the inverse of the factor above. Multiplying by 10-9 takes you from hertz to gigahertz; multiplying by 109 brings you back.
Put in words: one hertz equals 10-9 gigahertz, so the hertz is the smaller unit of this pair. Converting between them never changes the amount of frequency being measured — only the size of the unit you count it in.
Hertz (Hz) is the standard unit of frequency, measuring the number of cycles per second.
You encounter it everywhere in modern technology, from the sound you hear and the screen you're looking at to the speed of your computer's processor (CPU). The plural form is simply hertz.
The unit is named in honor of the German physicist Heinrich Rudolf Hertz.
In the late 1880s, he was the first person to provide conclusive proof of the existence of electromagnetic waves. His groundbreaking experiments laid the groundwork for the development of radio, television, and all forms of wireless communication.
Hertz is a fundamental measurement you encounter in everyday technology, often without realizing it. Here are two of the most common examples:
A sound's pitch is determined by its frequency (measured in hertz): higher frequencies produce higher pitches.
For example, the A above middle C on a piano is standardized at 440 Hz.
The refresh rate of your computer monitor, TV, or smartphone screen is measured in hertz.
This number indicates how frequently the display updates the image per second—a higher value results in smoother motion, which is especially noticeable in videos and gaming.
When discussing computer processors, you often hear the term gigahertz (GHz). One gigahertz is equal to one billion hertz (1 GHz = 109 Hz).
This value represents the processor's CPU clock speed—the number of processing cycles it can execute per second.
Before gigahertz became the standard, speeds were often measured in megahertz (MHz), where 1 GHz equals 1,000 MHz. While not the sole indicator of performance, a higher clock speed generally means a processor can perform calculations and execute instructions more quickly.
A gigahertz (GHz) is a unit of frequency in the International System of Units (SI), equal to one billion hertz (109 Hz). The plural form is gigahertz.
The gigahertz measurement is famously used to indicate a computer's CPU clock speed, which tells you how many processing cycles it can complete per second.
For example, a 3.2 GHz processor can handle 3.2 billion cycles every second.
While a higher GHz number often suggests a faster processor, overall performance also depends on other critical factors, such as the number of cores and the chip's architecture.
Your daily wireless connections, like Wi-Fi and Bluetooth, operate on specific gigahertz frequency bands.
The most common Wi-Fi bands are 2.4 GHz and 5 GHz.
Each has its own strengths:
Similarly, 5G mobile networks use various GHz frequencies to deliver the ultra-fast data transmission that powers modern mobile devices.
Focusing solely on gigahertz to judge a processor's performance is a common mistake known as the "gigahertz myth."
A processor with a lower clock speed but a more efficient design (e.g., more cores, a larger cache, or better instructions per cycle) can easily outperform a processor with a higher GHz rating.
This is why comparing processors requires looking at a combination of specifications, not just the clock speed.
Here are some quick reference conversions from hertz (Hz) to gigahertz (GHz):
| hertz | gigahertz |
|---|---|
| 0.000001 Hz | 10-15 GHz |
| 0.001 Hz | 10-12 GHz |
| 0.1 Hz | 10-10 GHz |
| 1 Hz | 10-9 GHz |
| 2 Hz | 2× 10-9 GHz |
| 3 Hz | 3× 10-9 GHz |
| 4 Hz | 4× 10-9 GHz |
| 5 Hz | 5× 10-9 GHz |
| 6 Hz | 6× 10-9 GHz |
| 7 Hz | 7× 10-9 GHz |
| 8 Hz | 8× 10-9 GHz |
| 9 Hz | 9× 10-9 GHz |
| 10 Hz | 10-8 GHz |
| 20 Hz | 2× 10-8 GHz |
| 30 Hz | 3× 10-8 GHz |
| 40 Hz | 4× 10-8 GHz |
| 50 Hz | 5× 10-8 GHz |
| 100 Hz | 10-7 GHz |
| 1000 Hz | 10-6 GHz |
| 10000 Hz | 10-5 GHz |
For all Frequency converters, choose units using the From/To dropdowns above.