Convert Megahertz (MHz) to Gigahertz (GHz)

1 megahertz equals 0.001 gigahertz.

Formula: GHz = MHz × 0.001

Megahertz to Gigahertz Converter

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What Is a Megahertz?

The megahertz (MHz) is an SI unit of frequency equal to 1,000,000 hertz (one million cycles per second). It is used for FM radio broadcasting (87.5-108 MHz), older processor clock speeds, NFC technology (13.56 MHz), and many wireless communication bands.

What Is a Gigahertz?

The gigahertz (GHz) is an SI unit of frequency equal to 1,000,000,000 hertz (one billion cycles per second) or 1,000 megahertz. It is used for WiFi frequencies (2.4 and 5 GHz bands), modern processor clock speeds (3-5 GHz), 5G networks, and microwave frequencies.

Megahertz to Gigahertz Formula

The conversion is exact by SI definition:

gigahertz = megahertz ÷ 1,000

Both units use SI prefixes: mega = 10⁶, giga = 10⁹. The ratio is always exactly 1,000.

Worked Example

Convert 2,400 MHz (WiFi 2.4 GHz band) to gigahertz:

  1. Divide: 2,400 ÷ 1,000 = 2.4 GHz

Common Megahertz to Gigahertz Conversions

MHzGHzContext
700 MHz0.7 GHzLTE Band 12/17 (T-Mobile, AT&T)
900 MHz0.9 GHzGSM band / LoRa (915 MHz Americas)
1,800 MHz1.8 GHzLTE Band 3 / CPU base clock (laptop)
2,400 MHz2.4 GHzWiFi (802.11n/ax) / Bluetooth / microwave
3,500 MHz3.5 GHz5G NR mid-band (n78) / gaming CPU base
5,000 MHz5.0 GHzWiFi 5 GHz band (802.11ac/ax)
5,800 MHz5.8 GHzFPV drone video / ISM band
6,000 MHz6.0 GHzWiFi 6E band (5.925-7.125 GHz)
28,000 MHz28 GHz5G mmWave (ultra-fast, short range)
60,000 MHz60 GHzWiGig (802.11ad) / V-band radar
77,000 MHz77 GHzAutomotive radar (adaptive cruise control)

Why Do WiFi and Microwave Ovens Share 2.4 GHz?

Both use the 2.4 GHz ISM (Industrial, Scientific, and Medical) band, allocated by the ITU for unlicensed use. Microwave ovens were already using 2.45 GHz for heating food (water molecules absorb this frequency efficiently). When WiFi was developed, the 2.4 GHz ISM band was chosen because it required no license, despite the interference from ovens. The 5 GHz band was later opened to provide a less congested alternative.

When You Need This Conversion

  • Wireless networking: Router specs list channels in MHz (e.g., channel 36 = 5,180 MHz) but bands in GHz (2.4 GHz, 5 GHz, 6 GHz). 5,180 MHz = 5.18 GHz.
  • CPU specifications: Processor specs mix MHz and GHz. A 4,700 MHz boost clock = 4.7 GHz. Base vs. boost clocks are both reported in GHz now, but older specs used MHz.
  • 5G and telecom: Spectrum auctions and carrier announcements use both units. The C-band (3,700-3,980 MHz) = 3.7-3.98 GHz.

Frequently Asked Questions

How many MHz are in 1 GHz?

Exactly 1,000 MHz. This is an exact SI definition — giga (10⁹) ÷ mega (10⁶) = 10³ = 1,000.

What frequency is 5G?

5G uses three frequency ranges: low-band (600-900 MHz), mid-band (2.5-3.7 GHz, also called C-band), and mmWave (24-47 GHz). Mid-band offers the best balance of speed and coverage.

What is the difference between MHz and GHz?

GHz is 1,000 times larger than MHz. Both measure frequency (cycles per second). MHz = millions of cycles/second; GHz = billions. Example: 2,400 MHz = 2.4 GHz.

Is 2.4 GHz WiFi the same as 2,400 MHz?

Yes — 2.4 GHz = 2,400 MHz exactly. The 2.4 GHz WiFi band actually spans 2,400-2,500 MHz, divided into 14 channels (channels 1, 6, and 11 are non-overlapping).

How do I convert GHz back to MHz?

Multiply by 1,000. Example: 3.5 GHz × 1,000 = 3,500 MHz. Move the decimal 3 places right.

Common Megahertz to Gigahertz Conversions

Megahertz to Gigahertz (Part 1)
Megahertz Gigahertz Actions
100 megahertz 0.1 gigahertz
500 megahertz 12 gigahertz
900 megahertz 0.9 gigahertz
1000 megahertz 1 gigahertz
Megahertz to Gigahertz (Part 2)
Megahertz Gigahertz Actions
1800 megahertz 1.8 gigahertz
2400 megahertz 2.4 gigahertz
5000 megahertz 5 gigahertz

Megahertz to gigahertz Conversion Table

Reference table with common megahertz to gigahertz conversions. All values calculated with high precision.

Megahertz to Gigahertz Table
0.1 to 500

Megahertz Gigahertz Actions
0.1 MHz 0.0001 GHz
14 MHz 0.00025 GHz
12 MHz 0.0005 GHz
1 MHz 0.001 GHz
2 12 MHz 0.0025 GHz
5 MHz 0.005 GHz
10 MHz 0.01 GHz
25 MHz 0.025 GHz
50 MHz 0.05 GHz
100 MHz 0.1 GHz
250 MHz 14 GHz
500 MHz 12 GHz

Megahertz to Gigahertz Table
1000 to 1 × 108

Megahertz Gigahertz Actions
1000 MHz 1 GHz
2500 MHz 2 12 GHz
5000 MHz 5 GHz
10000 MHz 10 GHz
25000 MHz 25 GHz
50000 MHz 50 GHz
100000 MHz 100 GHz
250000 MHz 250 GHz
500000 MHz 500 GHz
1000000 MHz 1000 GHz
2500000 MHz 2500 GHz
5000000 MHz 5000 GHz
10000000 MHz 10000 GHz
2.5 × 107 MHz 25000 GHz
5 × 107 MHz 50000 GHz
1 × 108 MHz 100000 GHz

Gigahertz to Megahertz Table
0.0001 to 12

Gigahertz Megahertz Actions
0.0001 GHz 0.1 MHz
0.00025 GHz 14 MHz
0.0005 GHz 12 MHz
0.001 GHz 1 MHz
0.0025 GHz 2 12 MHz
0.005 GHz 5 MHz
0.01 GHz 10 MHz
0.025 GHz 25 MHz
0.05 GHz 50 MHz
0.1 GHz 100 MHz
14 GHz 250 MHz
12 GHz 500 MHz

Gigahertz to Megahertz Table
1 to 100000

Gigahertz Megahertz Actions
1 GHz 1000 MHz
2 12 GHz 2500 MHz
5 GHz 5000 MHz
10 GHz 10000 MHz
25 GHz 25000 MHz
50 GHz 50000 MHz
100 GHz 100000 MHz
250 GHz 250000 MHz
500 GHz 500000 MHz
1000 GHz 1000000 MHz
2500 GHz 2500000 MHz
5000 GHz 5000000 MHz
10000 GHz 10000000 MHz
25000 GHz 2.5 × 107 MHz
50000 GHz 5 × 107 MHz
100000 GHz 1 × 108 MHz

Looking for the reverse? Convert Gigahertz to Megahertz

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Conversion factors verified against NIST, BIPM, ISO 80000-3 1 Hz = 1/s by definition (SI, BIPM). Last reviewed: March 2026
Adilson Fernandes By Adilson Fernandes
Tiago Fernandes Reviewed by Tiago Fernandes

All unit conversions on CoolConversion use conversion factors defined or documented by internationally recognised standards bodies (such as ISO and NIST), including both SI and non-SI units.

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