๐ Wavelength โ Frequency Converter
Radio waves, visible light, X-rays โ all EM waves at speed of light. Frequency and wavelength are inverse: c = f ร ฮป. Spans ELF radio to gamma rays.
Last updated โ conversions use exact ISO unit definitions.
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How it works
Wavelength and frequency are inversely proportional, related by the wave speed formula: c = ฮปf, where c is the speed of light (299,792,458 m/s in vacuum). Rearranged: ฮป = c/f and f = c/ฮป. Higher frequency = shorter wavelength, lower frequency = longer wavelength.
Units: wavelength in meters (m), centimeters (cm), millimeters (mm), or micrometers (ยตm). Frequency in hertz (Hz), gigahertz (GHz), terahertz (THz). Radio waves (100 MHz = 3 m) โ microwaves (10 GHz = 3 cm) โ infrared (10 THz = 30 ยตm) โ visible light (400โ700 THz) โ UV โ X-rays โ gamma rays.
For sound waves, use speed of sound (~343 m/s in air at 20ยฐC) instead of c. This tool uses speed of light (electromagnetic spectrum). Input either wavelength or frequency โ both update in real time.
Real-world applications
Radio and WiFi: FM radio 88-108 MHz (wavelength 3-3.4 meters). WiFi 2.4 GHz uses 12.5 cm waves; 5 GHz uses 6 cm waves. Shorter wavelength = more bandwidth but shorter range.
Visible light: Red light = 650 nm = 461 THz. Blue light = 450 nm = 666 THz. Higher frequency (shorter wavelength) = higher energy per photon.
Wavelength and frequency are inversely proportional
Speed of light c = 299,792,458 m/s = frequency ร wavelength. Radio = meters-km. Microwaves = cm. IR = ยตm. Visible light = 380-740 nm. UV = 10-380 nm. X-rays = pm.
How accurate are these conversions?
All conversions use ISO 80000 standard unit definitions. For example, 1 inch = 2.54 centimeters exactly by international agreement.
Why can't I see all units on mobile?
The result table scrolls horizontally. The headline pair above shows the most commonly requested conversion.
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No. All calculations happen in your browser. We collect zero personal data.
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