This isn’t possible though 6.1 lbs lost = 1 inch lost because the fatter you are the more weight you gain per inch.
It’s mentioned here Need some help with optimizing a multiple path visual novel without having to make a ton of renders - #7 by dingotush
But also that just makes sense in order to double the volume of a sphere you don’t have to double it’s radius.
But I guess Female: 28.81919 + (2.218007*(BMI)) − (3.688953*(OlderThan35 – will be 0 or 1)) + (0.125975*(Age)(OlderThan35 – will be 0 or 1)) − (0.6570163 (Black – will be 0 or 1)) + (0.1818819*(Hispanic – will be 0 or 1)) would work? Although, I’m not sure how helpful this is. Because bmi is based on height and weight, you can’t use bmi in relation to waist size. Really the most important formula is waist size to weight. At least for daz3d where you can measure metrics the waist size.
Going back to dinotush’s post… I wonder how to calculate the change from weight squared from girth to the 1.41 power.
Okay I think I get it now so if weight is doubled that means weight=weight^2 and sqrt(2) is 1.41 so waist goes up by waist^1.41
So if weight goes from 30inches to 40inches that’s 30^x=40 so uh. Which makes x = 1.0845 and the square of that is… 1.1761 so uh new weight is equal to old weight to the 1.1761 power?
Maybe it’s square root of 1.0845 which is 1.04139! Silly me I did it backwards
Okay now I understand. Going from 30" waist 150lbs to 40" waist makes you 184lbs which seems about right? Very near 6lbs per inch.
TLDR someone needs to make a chart grid of like weight=rows height columns width. I am stinking up this math post.