Wavenumber Converter
Convert wavenumber between listed units.
Open toolWavenumber Calculator
Find angular wavenumber as 2π divided by wavelength. Positive wavelength; output is radians per metre, distinct from reciprocal wavelength in cycles/m.
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Enter the inputs, then select Calculate.
Your result
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Result will appear here
How Wavenumber Calculator works
Find angular wavenumber as 2π divided by wavelength.
Positive wavelength; output is radians per metre, distinct from reciprocal wavelength in cycles/m. Inputs and results use floating-point numbers and may be rounded. Results show up to 12 significant digits.
How to use Wavenumber Calculator
Follow the labelled inputs.
Enter wavelength (m)
Replace the example with wavelength (m). The field labels specify the expected format and units.
Input and settings
Check the remaining inputs
This tool uses one input. Check the supported range before running it. Positive wavelength; output is radians per metre, distinct from reciprocal wavelength in cycles/m.
Tool result
Run, review and save
Select Calculate. Review the calculated result, then copy it or download the result text.
Review the details
Examples and uses for Wavenumber Calculator
Check the supplied example
The starting example produces 3.14159265359 rad/m. Find angular wavenumber as 2π divided by wavelength.
Use your own inputs
Read the labels for wavelength (m). Positive wavelength; output is radians per metre, distinct from reciprocal wavelength in cycles/m.
Record a reviewed result
Copy the calculated result into your notes. Keep the formula and assumptions with it if someone else needs to reproduce the calculation.
How to read the result
Read the units and assumptions with the output.
Find angular wavenumber as 2π divided by wavelength.
Positive wavelength; output is radians per metre, distinct from reciprocal wavelength in cycles/m. Inputs and results use floating-point numbers and may be rounded. Results show up to 12 significant digits.
Supported input and limits
Check the stated scope before you run it.
Positive wavelength; output is radians per metre, distinct from reciprocal wavelength in cycles/m. Inputs and results use floating-point numbers and may be rounded. Results show up to 12 significant digits.
The input stays in this browser. Copy result and Download save the same displayed text.
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Open toolWavenumber Calculator: common questions
Answers about using Wavenumber Calculator and understanding its results.
What inputs and assumptions apply?
Positive wavelength; output is radians per metre, distinct from reciprocal wavelength in cycles/m. Inputs and results use floating-point numbers and may be rounded. Results show up to 12 significant digits.
How can I save the result?
Copy result copies the displayed text. Download saves the same text as a TXT file. Processing runs in this browser without an account.
Calculate with your input
Check the calculated result, then copy or download it.