Megahertz to gigahertz (MHz to GHz) converter

What is a megahertz to gigahertz converter?

A megahertz to gigahertz converter is an online tool that translates a frequency expressed in megahertz (MHz) into the equivalent value in gigahertz (GHz), and the other way around. Both units measure how many cycles a periodic signal completes per second, so the conversion is a straightforward change of scale rather than a change of physical quantity. The tool is handy whenever you read a clock speed, radio band, or sampling rate in one unit but need it in the other.

The hertz (Hz) is the base SI unit of frequency, equal to one cycle per second. The prefixes “mega” and “giga” simply add factors of one thousand: one megahertz is one million hertz, and one gigahertz is one billion hertz. Because gigahertz is exactly one thousand times larger than megahertz, moving between them only shifts the decimal point.

How it works

To go from megahertz to gigahertz you divide by 1000, because a gigahertz contains a thousand megahertz. To go the other way, from gigahertz to megahertz, you multiply by 1000. There is no rounding or approximation involved: the factor of 1000 is exact, so the conversion is precise for any input. The converter on this page applies these factors automatically as soon as you type a number in either field, and you can also switch the units to hertz (Hz) or kilohertz (kHz) if your data uses those scales.

Formula

The exact relationships between the two units are:

$\text{GHz} = \frac{\text{MHz}}{1000}$

$\text{MHz} = \text{GHz} \times 1000$

Megahertz to gigahertz conversion table

The table below lists common megahertz values alongside their gigahertz equivalents.

Examples

Example 1: A typical processor clock

A computer’s CPU is advertised as running at 1000 MHz. To express this in gigahertz, divide by 1000:

$\frac{1000 \text{ MHz}}{1000} = 1 \text{ GHz}$

So 1000 MHz is exactly 1 GHz.

Example 2: Converting back to megahertz

A graphics card is rated at 1 GHz and you want the figure in megahertz. Multiply by 1000:

$1 \text{ GHz} \times 1000 = 1000 \text{ MHz}$

The 1 GHz rating equals 1000 MHz.

Example 3: A Wi-Fi band

The common 2.4 GHz Wi-Fi band is often quoted in firmware tables as 2400 MHz. Converting confirms they are the same:

$\frac{2400 \text{ MHz}}{1000} = 2.4 \text{ GHz}$

So 2400 MHz is 2.4 GHz.

Example 4: A zero value

A signal with a frequency of 0 MHz is a constant (direct-current) signal with no oscillation. Converting gives:

$\frac{0 \text{ MHz}}{1000} = 0 \text{ GHz}$

Zero in one unit is always zero in the other.

Notes

• The factor of 1000 between megahertz and gigahertz is exact, so conversions never lose accuracy.
• Frequency units describe cycles per second; converting between MHz and GHz does not change the underlying frequency, only how it is written.
• This converter also supports hertz (Hz) and kilohertz (kHz), so you can chain through any of the SI frequency scales.
• Do not confuse frequency with data rate: a 1 GHz clock and a 1 Gbps data rate are different physical quantities, even though both use “giga”.

Frequently asked questions

How many megahertz are in a gigahertz?

There are exactly 1000 megahertz in one gigahertz, because the “giga” prefix is one thousand times larger than the “mega” prefix.

How do I convert MHz to GHz?

Divide the number of megahertz by 1000. For example, 2400 MHz divided by 1000 equals 2.4 GHz.

Is 1000 MHz the same as 1 GHz?

Yes. One gigahertz is defined as one thousand megahertz, so 1000 MHz and 1 GHz describe the identical frequency.

Why are CPU and Wi-Fi speeds sometimes given in MHz and sometimes in GHz?

Both units are valid; engineers often pick whichever keeps the number compact. A 2.4 GHz band reads more cleanly than 2400 MHz, while small offsets within a band are easier to express in MHz.

Does converting MHz to GHz lose precision?

No. The conversion only moves the decimal point three places, and the factor of 1000 is exact, so no rounding error is introduced.

Can I convert MHz to hertz with this tool?

Yes. Each field lets you switch to hertz (Hz) or kilohertz (kHz). One megahertz equals 1,000,000 hertz, so changing the unit selector handles that conversion as well.