Flow convertion chart from a depression to another

[GordonE]

Hi!
I found this Excel chart on the web. I think some of you find it good to have if you cant flow 28" on a bigger head or likewise.

I tested to convert my calibration plate that is 307CFM@28", I mesured it at 10" instead and the bench read 181.
Multiplied with 1.67 this gives 302.2CFM, so it is pretty close to the truth!

I didnt find it in this section, so i think it is a newbie.

Thanks to the man that did it in the first case!

I just realized thet this isnt a spreadsheet, so I will make a new post in the Formula section!

Thanks Gordon