Convert Gigahertz (GHz) to Terahertz (THz)

1 gigahertz equals 0.001 terahertz.

Formula: THz = GHz × 0.001

Gigahertz to Terahertz Converter

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How to Convert Gigahertz to Terahertz

1 gigahertz = 0.001 terahertz

Terahertz = Gigahertz × 0.001

Example: 1 GHz × 0.001 = 0.001 THz

Reverse Conversion

To convert terahertz back to gigahertz:

  • Remember, 1 terahertz equals 1000 gigahertz.
  • To convert 0.001 THz to GHz, multiply 0.001 x 1000, resulting in 1 GHz.

Common Gigahertz to Terahertz Conversions

Gigahertz to Terahertz (Part 1)
Gigahertz to Terahertz common conversions part 1
Gigahertz Terahertz Actions
1 gigahertz 0.001 terahertz
5 gigahertz 0.005 terahertz
10 gigahertz 0.01 terahertz
25 gigahertz 0.025 terahertz
Gigahertz to Terahertz (Part 2)
Gigahertz to Terahertz common conversions part 2
Gigahertz Terahertz Actions
50 gigahertz 0.05 terahertz
100 gigahertz 0.1 terahertz
500 gigahertz 12 terahertz
1000 gigahertz 1 terahertz

Gigahertz to terahertz Conversion Table

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

Gigahertz to Terahertz Table
0.1 to 500

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

Gigahertz to Terahertz Table
1000 to 1 × 108

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

Terahertz to Gigahertz Table
0.0001 to 12

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

Terahertz to Gigahertz Table
1 to 100000

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

Definition of Gigahertz

Gigahertz: Microwave and Computing Frequency Unit

The gigahertz (symbol: GHz) is a unit of frequency equal to one billion hertz (10⁹ Hz). It is the standard unit for describing modern processor clock speeds, Wi-Fi frequencies, and microwave communications. The 2.4 GHz and 5 GHz bands are familiar to anyone who has configured a Wi-Fi router.

Conversions to Other Units of Measurement:

  1. Hertz (Hz): 1 GHz equals exactly 1,000,000,000 Hz. A 3 GHz processor executes 3 billion clock cycles per second.
  2. Megahertz (MHz): 1 GHz equals exactly 1,000 MHz. This conversion is frequently used when comparing old and new processor specifications.
  3. Kilohertz (kHz): 1 GHz equals 1,000,000 kHz.
  4. Terahertz (THz): 1 GHz equals 0.001 THz. The terahertz gap between microwave and infrared is an active area of research.

Modern smartphones typically have processors clocked between 2-3 GHz, while desktop CPUs can boost above 5 GHz. The unit is also essential in radar, satellite communications, and 5G cellular networks.

Definition
SI decimal multiple of hertz; 1 GHz = 1,000,000,000 Hz = 10⁹ Hz
Common equivalents
  • 1 GHz = 10⁹ Hz (exact)
  • 1 GHz = 1,000 MHz (exact)
  • 1 GHz = 0.001 THz (exact)
Sources

Definition of Terahertz

Terahertz: Far-Infrared and Research Frequency Unit

The terahertz (symbol: THz) is a unit of frequency equal to one trillion hertz (10¹² Hz). Terahertz radiation occupies the electromagnetic spectrum between microwave and infrared light, often called the "terahertz gap" because it was historically difficult to generate and detect. Recent advances have opened this band for security scanning, medical imaging, and 6G research.

Conversions to Other Units of Measurement:

  1. Hertz (Hz): 1 THz equals exactly 10¹² Hz (one trillion hertz).
  2. Gigahertz (GHz): 1 THz equals exactly 1,000 GHz. Future 6G wireless networks may operate in the 0.1-1 THz range.
  3. Megahertz (MHz): 1 THz equals 1,000,000 MHz.

Terahertz imaging can see through clothing, paper, and plastic without ionizing radiation, making it useful for airport security screening and non-destructive testing of materials.

Definition
SI decimal multiple of hertz; 1 THz = 10¹² Hz
Common equivalents
  • 1 THz = 10¹² Hz (exact)
  • 1 THz = 1,000 GHz (exact)
  • 1 THz = 10⁶ MHz (exact)
Sources

About the Gigahertz

Modern CPU clock speeds hover around 3-5 GHz because increasing frequency further creates excessive heat. Instead, processors add more cores to increase performance. The highest verified CPU overclock reached 9.008 GHz on an AMD FX-8370 in 2024.

5G cellular networks use multiple frequency bands, including sub-6 GHz bands (similar to 4G) and millimeter wave (mmWave) bands from 24-100 GHz, which offer extremely high speeds but limited range.

About the Terahertz

Terahertz radiation has unique properties: it can penetrate many non-metallic materials (clothing, paper, plastic, ceramics) but is absorbed by water and reflected by metals. This makes it ideal for security screening — airport body scanners use terahertz waves to detect concealed objects without ionizing radiation.

Research into 6G communications is exploring the 0.1-1 THz range, which could theoretically deliver data rates of 1 terabit per second — fast enough to download an entire 4K movie in less than a second.

Frequently Asked Questions

How many terahertz are in one gigahertz?

One gigahertz equals 0.001 terahertz. To convert, multiply the gigahertz value by 0.001. For the reverse, divide the terahertz value by 0.001 (or multiply by 1000).

What is 100 gigahertz in terahertz?

100 gigahertz = 0.1 terahertz. This is one of the most commonly searched conversions for this pair.

Is the gigahertz-to-terahertz conversion exact?

Yes. The factor 0.001 is exact by international definition, not an approximation. Any imprecision comes only from the original measurement, not the conversion.

Looking for the reverse? Convert Terahertz to Gigahertz

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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
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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