🌊 Wavelength Calculator - Frequency to Wavelength Converter
Enter frequency to automatically compute wavelength, or enter wavelength to find frequency. Supports Hz/kHz/MHz/GHz/THz and m/cm/mm/μm/nm/km, with common signal presets.
Wavelength calculator for instant frequency-wavelength conversion. Based on the speed-of-light formula λ = c / f, with multi-unit auto-conversion and built-in AM/FM/WiFi/visible light presets.
λ = c / fTwo-way conversionMulti-unit supportSignal presets🔄 Conversion Direction
📡 Enter Frequency
📐 Wavelength Result
The Relationship Between Wavelength and Frequency
Wavelength (λ) and frequency (f) are two fundamental parameters of electromagnetic waves, related by the formula λ = c / f, where c is the speed of light in a vacuum (299,792,458 m/s). Higher frequency means shorter wavelength; lower frequency means longer wavelength.
Common electromagnetic wavelength ranges: radio waves (km~m), microwaves (cm~mm), infrared (μm), visible light (380-780nm), ultraviolet (nm), X-rays (pm).
This tool supports both frequency→wavelength and wavelength→frequency conversion, automatically choosing the most suitable display unit, and also allows manual output unit selection. It includes built-in presets for AM radio, FM radio, WiFi 2.4GHz/5GHz and visible light for quick reference.
❓ About the Wavelength Calculator
What is the relationship between wavelength and frequency?
Wavelength (λ) and frequency (f) are related by the formula λ = c / f, where c is the speed of light (299,792,458 m/s). Higher frequency means shorter wavelength; lower frequency means longer wavelength. For example, a 1MHz AM broadcast has a wavelength of about 300 meters, while 5GHz WiFi has a wavelength of only about 6 centimeters.
How do I choose the right wavelength unit?
Choose units based on wavelength size: use km/m for radio waves, cm/mm for microwaves, μm for infrared, and nm for visible light and ultraviolet. This tool automatically recommends a suitable unit, or you can select manually.
What presets does this calculator support?
It includes 5 common signal presets: AM radio (1MHz), FM radio (100MHz), WiFi 2.4GHz, WiFi 5GHz and visible light (500THz). Click a preset button to quickly compute the corresponding wavelength.
Is the calculation accurate?
This tool uses the exact speed of light c = 299,792,458 m/s. All calculations run locally in your browser and are precise and reliable. Scientific notation display is supported for very large or very small values.