Spectroscopic wavenumber converter
Convert spectroscopic wavenumber across supported units. Compare equivalent values using the stated physical definitions.
Result for the values shown.
Calculations run in your browser.
What to enter
| Input | Meaning and units |
|---|---|
| Value | Enter value using the definition in the method and example. |
| From | Select the unit or currency in which the entered number is currently expressed. |
| To | Select the unit or currency you need for the answer. |
Understanding your result
The converted value describes the same wavenumber quantity in the selected target unit. Display rounding does not add precision to the original measurement.
Common mistakes
- Confusing the source and target units, or overlooking a prefix or case-sensitive symbol.
Check your calculation
- Convert to the target unit and then reverse the direction. Within display rounding, you should recover the original value.
Read the wavenumber measurement guide · Calculation checks, sources and review limits
How do I express spectroscopic wavenumber in another unit?
Enter the known measurement and select its source and target units. The converter expresses the same spectroscopic wavenumber quantity in the target unit, using the stated definitions.
Common uses
- Compare measurements stated in different units.
- Translate a known value before using it in a formula or specification.
How it works
Convert through the shared base quantity using the two defined factors. Spectroscopic wavenumber is 1/wavelength. Angular wavenumber is 2π/wavelength and must not be treated as identical. Conversion changes the unit of a known measurement; it does not calculate another physical quantity or imply a material model. Factors with π or repeating rational values use finite precision; results display up to 12 significant digits.
Worked example
10 m⁻¹ equals approximately 0.1 cm⁻¹. Reverse the units to convert in the other direction.