Net to Gross
Hi Everyone,
I'm having a hard time understanding how to convert the net to gross for the PA practice exam. The answer says times 1+%, but then when I convert it back, it's not correct, so I was wondering if someone could explain to me how the math works?!
Like how is 2540, 25% of 3175? I'm not sure what I'm missing.

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There's an exhibit in the case study with the building program that shows you the net-to-gross factors that the different spaces require. The 2,540 accounts for the NSF of the health center program, and you utilize the net-to-gross factor to determine the GSF to figure out the cost per GSF.
Net SF accounts for the occupiable spaces of the program, and the net-to-gross factor estimates the additional Gross SF needed for circulation, utilities, support spaces, etc. for that set of the program. 2,540 NSF requires an additional 25% of SF to account for those additional spatial needs (635 SF), resulting in the 3,175 GSF number.
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I assume this is a case study. Like Abruno said there's a page in the program documents which will give you net-to-gross factors. For example it would say the factor for a certain program type is 1.25, or 1.2, etc. This is a ballpark of the amount of wasted space needed (25 or 20% respectively). Once you know where to find this info, you would apply the correct ratios to each program element to calculate new totals.
If you want to convert backwards for some reason, you would use the inverse of the ratio to get from gross back to net.
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