Honnouji Academy is huge, and there are several feats in which it's size is of relevance for scaling purposes. It's hard to know where to start from, but if in doubt, go by it's first appearence when Gamagoori threw Suzuki across it. Thankfully, we have an official height chart (of sorts, though it doesn't list the official heights).
Thankfully, some kind stranger has calced the heights, with Gamagoori's smallest form being 230cm (or 2.3m) tall.
With that, we can scale the diameter of the Honnouji Academy grounds.
10 pixels = 2.3m
1 pixel = 2.3m/10 = 0.23m
0.23m X 1784 = 410.32m
Now we have the width of the area, let's also get the height of Honnouji Academy (there's also the walls to take into account, but eh).
56 pixels = 410.32m
1 pixel = 410.32m/56 = 7.32714286m
7.32714286m X 414 = 3033.43714m (3.03343714km)
Final Results
Honnouji Academy height = 3.033km
1 pixel = 2.3m/10 = 0.23m
0.23m X 1784 = 410.32m
Now we have the width of the area, let's also get the height of Honnouji Academy (there's also the walls to take into account, but eh).
1 pixel = 410.32m/56 = 7.32714286m
7.32714286m X 414 = 3033.43714m (3.03343714km)
Final Results
Honnouji Academy height = 3.033km
