My millimetre-wave radar module is spec'd at 77 GHz. A research paper refers to it in THz — how do I convert?

77 GHz ÷ 1,000 = 0.077 THz. The paper places the frequency on a chart spanning the full electromagnetic spectrum, which uses THz as its unit for this region.

Airport security body scanners are described as terahertz scanners. What GHz range do they operate in?

Typically 300–600 GHz (0.3–0.6 THz). These frequencies penetrate fabric but reflect off skin and metallic objects, producing images without ionising radiation.

I'm reading a photonics paper that gives a laser frequency as 1.5 THz. What is that in GHz so I can compare it to my RF equipment?

1.5 THz × 1,000 = 1,500 GHz. Most RF test equipment tops out well below this range — THz sources require specialised photonic or quantum-cascade devices beyond conventional RF hardware.

What sits between GHz and THz on the frequency spectrum?

The 100–1,000 GHz range (0.1–1 THz) is called the terahertz gap or millimetre-wave band. It is difficult to generate and detect efficiently with conventional electronics or optics, making it an active research area for imaging, spectroscopy, and high-speed wireless links. See also: [GHz to MHz](/frequency/ghz-to-mhz/).

GHz to THz Converter

Enter a value to instantly convert between frequency units.

From

Precision4 dp

1 Gigahertz = 0.001 Terahertz

Key Formulas

Hertz → Kilohertz

kHz = Hz × 0.001

Kilohertz → Hertz

Hz = kHz × 1000

Megahertz → Gigahertz

GHz = MHz × 0.001

Gigahertz → Megahertz

MHz = GHz × 1000

Formula

THz = GHz ÷ 1,000

Terahertz frequencies (0.1–10 THz) bridge the gap between microwave and infrared light, offering unique properties for imaging, spectroscopy, and emerging wireless standards. Gigahertz measures common RF frequencies — Wi-Fi at 2.4 GHz, cellular bands, microwave ovens, and modern processors. Converting GHz to THz helps engineers and researchers contextualise where terahertz sits relative to familiar RF systems. A 300 GHz millimetre-wave signal is 0.3 THz — the edge of the terahertz gap explored in security imaging and materials research.

Source: NIST SP 811, Table B.8

Last reviewed: 2026-06-11 · see our methodology

Frequently Asked Questions

Real-World Examples

Lower boundary of the terahertz gap. 300 GHz (0.3 THz) marks where traditional microwave electronics meets THz photonics research.

300 GHz = 0.3 THz

Automotive radar sensors operate at 77 GHz (0.077 THz). These short-range radars enable adaptive cruise control and pre-collision braking.

77 GHz = 0.077 THz

Exactly 1 THz = 1,000 GHz. This frequency is used as a reference point in THz spectroscopy and falls in the far-infrared region of the spectrum.

1000 GHz = 1 THz

600 GHz (0.6 THz) is used in some airport security body scanners. THz waves penetrate clothing but are non-ionising, unlike X-rays.

600 GHz = 0.6 THz

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GHz to THz Converter

Key Formulas

Formula

Frequently Asked Questions

Real-World Examples

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