---
title: "Raman Shift Converter calculator — AperiOptic"
description: "Convert between excitation/emission wavelength and Raman shift in cm⁻¹. Free online optics calculator, with the formula and code snippets."
url: "https://aperioptic.com/calculators/raman-shift-converter"
---

# Raman Shift Converter calculator

Convert between excitation/emission wavelength and Raman shift in cm⁻¹.

Category: [Spectroscopy](https://aperioptic.com/calculators)

Formula: `Δν̃ = 1/λex − 1/λem (cm⁻¹)`

## Inputs

| Input | Parameter | Unit | Default |
| --- | --- | --- | --- |
| λ excitation | `lex` | nm | 532 |
| λ emission | `lem` | nm | 560 |

## Result with the default inputs

- Raman shift: 939.8496 cm⁻¹
- Predicted λem: 560 nm

Open it with your own values: put each input in the address as a parameter, for example [`/calculators/raman-shift-converter?lex=532`](https://aperioptic.com/calculators/raman-shift-converter?lex=532). A unit other than the listed one goes in `<parameter>_unit`.

Read more: [Wikipedia: Raman spectroscopy](https://en.wikipedia.org/wiki/Raman_spectroscopy)

[All optics calculators](https://aperioptic.com/calculators)

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The interactive page: https://aperioptic.com/calculators/raman-shift-converter (AperiOptic runs in the browser; free, no account). Every page of the site as Markdown: https://aperioptic.com/llms.txt