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Megahertz to gigahertz

Multiply megahertz by 0.001 to get gigahertz.

1 MHz = 0.001 GHzBIPM SI
MHz
2GHz

2,000 MHz = 2 GHz

How to convert megahertz to gigahertz

The gigahertz is one billion hertz (10⁹ Hz). The megahertz is one million hertz (10⁶ Hz).

Worked example — 2,000 MHz: 2,000 × 0.001 = 2 GHz.

Megahertz to gigahertz table

Common conversions. The reverse table is on gigahertz to megahertz.
MegahertzGigahertz
100 MHz0.1 GHz
500 MHz0.5 GHz
1,000 MHz1 GHz
1,400 MHz1.4 GHz
2,000 MHz2 GHz
2,400 MHz2.4 GHz
3,000 MHz3 GHz
5,000 MHz5 GHz
5,800 MHz5.8 GHz

Reverse and related

About megahertz and gigahertz

Megahertz (MHz)

1 MHz = 0.001 GHz

Definition. One million hertz (10⁶ Hz)

History and origin

The megahertz is one million hertz, the scale of radio broadcasting and early computer processors. It marked the clock speed of personal computers into the 1990s.

Current use

Megahertz are used for radio frequencies and were long the unit for processor clock speeds.

Source: BIPM SI Brochure (2019); ISO 80000-3

Gigahertz (GHz)

1 GHz = 1,000 MHz

Definition. One billion hertz (10⁹ Hz)

History and origin

The gigahertz is one billion hertz, reached by processors and wireless systems as electronics grew faster. Modern chips and Wi-Fi operate at gigahertz frequencies.

Current use

Gigahertz describe CPU clock speeds and Wi-Fi and mobile radio bands.

Source: BIPM SI Brochure (2019); ISO 80000-3

Where people use this

Megahertz: radio, CPU clocks (older). Gigahertz: CPU and Wi-Fi, processor speeds. 2400 MHz is 2.4 GHz — the Wi-Fi band.

How we know this is right
The factor is fixed by the standards that define the units, not chosen — so it is exact, not a measurement:
1 GHz = 1,000 MHz, so 1 MHz = 1 ÷ 1,000 = 0.001 GHz.

Every value is carried to full double precision; the display is rounded.

Both units are defined in BIPM SI Brochure (2019); ISO 80000-3.

Questions people ask

How many GHz is 2400 MHz?

2400 MHz is 2.4 GHz — the common Wi-Fi band.

How many MHz in a GHz?

One gigahertz is 1000 megahertz.

How many GHz is 5000 MHz?

5000 MHz is 5 GHz.

All megahertz conversions