<p>I am confused how to convert from <span class="math-container">${\rm cm^{-2}\,s^{-1}\,Å^{-1}}$</span> to <span class="math-container">${\rm erg\,cm^{-2}\,s^{-1}\,Å^{-1}}$</span>. How do I do that?</p>

CC BY-SA 4.0
2021-06-22T23:01:10.613Z
The first is a number flux, while the second is an energy flux. So you need to know the energy of the photons.
pela
CC BY-SA 4.0
2021-06-23T14:22:50.223Z
Welcome to astronomy SE, I converted your units to a more readable format.
B--rian
CC BY-SA 4.0
2021-06-23T19:59:02.743Z
Don't be disheartened by the fact that your first question got immediately closed, I would be happy to vote for reopen if you edit in a bit more context where those units occur and what you are trying to do.
B--rian
<units><photons><flux>
Flux Density Unit Conversion
eschev
# Flux Density Unit Conversion

(Asked by: username_0 on 2021-06-22)

I am confused how to convert from ${\rm cm^{-2}\,s^{-1}\,Å^{-1}}$ to ${\rm erg\,cm^{-2}\,s^{-1}\,Å^{-1}}$. How do I do that?

**Tags:** units, photons, flux

> **Comments:**
> **username_1**: The first is a number flux, while the second is an energy flux. So you need to know the energy of the photons.  
> **username_2**: Welcome to astronomy SE, I converted your units to a more readable format.  
> **username_2**: Don't be disheartened by the fact that your first question got immediately closed, I would be happy to vote for reopen if you edit in a bit more context where those units occur and what you are trying to do.  

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