I'm poking through information and searches on calculating ranges for artillery weapons, and I'm finding a lot of simple ballistic calculators, which don't fit what I want, or calculators for small arms, which may be accurate enough but don't allow for the correct values and/or use values for which I don't have the answer to.
I want to be able to calculate the range of a warship's guns. Specifically, I need this information to include air drag based on air density, and range reduction based on gravity. The latter is fairly simple, the former... probably not.
Ideally, I'd be able to punch in the information from the guns of an Iowa-Class battleship, and see how far it'd be able to shoot on different worlds. I'm not asking for an online calculator, though they'd be nice, "just" the equation and an explanation for that equation. I'm not afraid to do things by hand if I have to, but I am not a mathematician. I can generally understand formulas and how they work, but they need to be disassembled and explained. Walls of formulas become quite unreadable.
Edit: In my further studies, the math is beyond my personal knowledge to decipher a formula dump. This Page, for example, seems to have all of the information required. I just can't make anything useful out of minimal explanations and walls and walls of formulas. A more expansive explanation of the formulas involved would be greatly appreciated.