Ultimate Frequency & Wavelength Converter

Convert between frequency and wavelength instantly. This tool supports common frequency units (Hz → THz) and wavelength units (m → Å) with a custom propagation speed (default: speed of light in vacuum).

Key Features

• Two-way conversion: type in any unit to update all others.
• Supports custom speed (m/s) for different media.
• Clean, responsive layout with live results.

Formula

• Wave equation: v = f × λ
• Frequency: f = v / λ
• Wavelength: λ = v / f

References

• Frequency (Wikipedia)
• Wavelength (Wikipedia)
• Speed of light (Wikipedia)

Tip: For refractive index n, speed in medium ≈ c / n. Set speed accordingly to model non-vacuum propagation.