Supply Class Calculator

This calculator estimates daily and total tonnage across six supply classes for a unit sustaining an operation over a set number of days. Combat intensity is the input with the largest effect on Total (short tons): it is a coded mode switch (0=Garrison through 3=Sustained), not a small continuous quantity, and walking it across its full range at the default personnel, days, and vehicle counts moves Total from about 47.6 tons at Garrison to 151.9 tons at Sustained -- a swing that outpaces every other single input's effect at those same defaults, including days of supply. Combat intensity does not appear as a flat multiplier on the total the way days of supply does -- instead it selects two separate lookup factors, a POL factor from 0.5 to 2.0 that scales Class III (and Class IV construction supply) and an ammo factor from 0.3 to 5.0 that scales Class V (lines 16 and 23) -- so raising intensity from Garrison to Sustained pushes Class V far harder than Class III.

Days of supply, by contrast, is the one input every one of the six class formulas multiplies by directly (lines 10, 13, 17, 20, 24, 27), so while its effect on any single class is only TIED with whichever other input feeds that class -- Class I rations scales identically with personnel count and days of supply (line 10), Class III POL scales identically with vehicle count and days of supply (line 17), and Class V ammo scales identically with personnel count and days of supply (line 24) -- it is the only input that is a genuine mechanism shared by every class in the aggregate, even though combat intensity's swing moves the total more. Daily tons required divides the total by days of supply, which cancels out most of days of supply's own effect on the daily figure; combat intensity's effect survives that division at essentially the same relative size, so it remains the largest lever on the daily figure too. Class I rations depends only on personnel count and days of supply -- vehicle count and combat intensity never enter that formula at all (line 10).