Compare calculators

Both calculators run independently — change the inputs on either side to compare results.

Wavelength to Frequency Calculator

Converts the wavelength of an electromagnetic wave to its frequency using the speed of light (c ÷ wavelength). Enter a wavelength in metres and get the corresponding frequency in hertz.

Wavelength (m)

Physics

Decibel Calculator (Power Ratio)

Converts a ratio of two power levels into decibels using 10 × log10(P1 ÷ P2). Decibels express how many times larger or smaller one power is than another on a logarithmic scale used in acoustics, electronics, and signal processing.

Power 1 (measured) (W)

Power 2 (reference) (W)

Key differences

	Wavelength to Frequency Calculator	Decibel Calculator (Power Ratio)
Category	Physics	Physics
Inputs required	1	2
Result	Frequency (Hz)	Level Difference (dB)
What it does	Converts the wavelength of an electromagnetic wave to its frequency using the speed of light (c ÷ wavelength). Enter a wavelength in metres and get the corresponding frequency in hertz.	Converts a ratio of two power levels into decibels using 10 × log10(P1 ÷ P2). Decibels express how many times larger or smaller one power is than another on a logarithmic scale used in acoustics, electronics, and signal processing.