Guide: AP Penetration Calculator

[Imp]

Could come in handy with some units at the start of the battle to get an idea of there capabilities.
May I suggest updating with a calculator set out like example weapons.
i.e already has range in the formula so you just enter max range & pen & it gives a series of results for ranges. You can instantly determine effective range then vs expected targets which is I think the idea. You could also add a note higher warhead sizes have a reasonable chance of better penetration.