Wavelength and Frequency Calculator
Convert a wave frequency to wavelength using the speed of light.
How it works
Wavelength = speed of light ÷ frequency, with c = 299,792,458 m/s. This fits radio, light, and other electromagnetic waves travelling in a vacuum or air. Period = 1 ÷ frequency.
FAQ
Is this calculator free?
Yes. No signup is needed and nothing you enter is stored.
Is the result exact?
Results are rounded for display. For financial, medical, or legal decisions, confirm with a professional.
Do my numbers leave my device?
No. The calculation runs in your browser.