Wavelength Calculator – Calculate Wavelength from Frequency
Find the wavelength of any wave using our wavelength calculator. Enter frequency and wave speed to calculate λ = v/f for electromagnetic, sound, or water waves.
How to Calculate Wavelength
Enter Frequency
Input the wave frequency in Hz, kHz, MHz, or GHz.
Select Wave Type
Choose electromagnetic waves (light speed) or sound waves (343 m/s).
Get Wavelength Results
See wavelength with auto-scaled units and electromagnetic band classification.
Key Features of This Wavelength Calculator
**Multiple Frequency Units**
Enter frequency in Hz, kHz, MHz, or GHz for any application.
**EM & Sound Waves**
Calculate for light/radio waves or acoustic/sound waves.
**Auto-Scaled Output**
Results automatically shown in m, cm, µm, or nm for readability.
**Spectrum Classification**
Identifies the electromagnetic band (radio, microwave, visible, etc.).
Frequently Asked Questions
What is wavelength?
Wavelength (λ) is the distance between consecutive peaks of a wave. It's inversely proportional to frequency: λ = v/f, where v is wave velocity.
What is the relationship between frequency and wavelength?
They are inversely related. Higher frequency means shorter wavelength. Double the frequency and you halve the wavelength (for the same wave speed).
What is the speed of light?
The speed of light in vacuum is exactly 299,792,458 m/s (approximately 3×10⁸ m/s). All electromagnetic waves travel at this speed in vacuum.
What is the speed of sound?
Sound travels at approximately 343 m/s in air at 20°C. Speed varies with temperature, humidity, and the medium (faster in water, solids).
What are the electromagnetic spectrum bands?
From longest to shortest wavelength: radio waves, microwaves, infrared, visible light, ultraviolet, X-rays, and gamma rays.
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