Formulas

Please note, a lot of these are old formulas, and need to be updated. This list does not include every formula either.

Earth is a game of numbers and formulas. So here they are:

Calculating	Formula
Per Capita Income (PCI)	22.5 * (1 - Taxrate) * (1 + (Networth/Land)/90000) * (1 + 2 * Ent/Land) BusTech * GvtPCIBonus
Revenue	PCI * Pop * Taxrate
Construction Cost	3 * Land + 1500
Destruction Cost	0.2 * (3 * Land + 1500)
Oil Consumption	Oil is consumed at a rate of 1 Barrel for 25 Military Units (only applies to Troops, Jets and Tanks when attacking).
Buildings Per Turn	(CS/4 + 5) * GvtContrBonus
Military Upkeep	Troops Upkeep: Troops * .11 * MilTech% * (1 + Networth/40000000) * GvtBonus * Constant Jets Upkeep: Jets * .14 * MilTech% * (1 + Networth/40000000) * GvtBonus * Constant Turrets Upkeep: Turrets * .18 * MilTech% * (1 + Networth/40000000) * GvtBonus * Constant Tanks Upkeep: Tanks * .57 * MilTech% * (1 + Networth/40000000) * GvtBonus * Constant Spies Upkeep: Spies * 1 * MilTech% * (1 + Networth/40000000) * GvtBonus * Constant Constant = If MilBases/Land < .295 Constant = 1 - 1.3*(MilBases/Land) Else (that is, if the number of MilBases built is more than 29.5% of your land) Constant = 0.61
Alliance Costs	Defensive Allies: DefAllies * Networth * .002 (0.2% of NW each) Offensive Allies: OffAllies * Networth * .002 (0.2% of NW each) Intelligence Allies: IntelAllies * Networth * .0015 (0.15% of NW each) Research Allies: ResAllies * Networth * .0015 (0.15% of NW each) Trade Pacts: TradePacts * Networth * .0005 (0.05% of NW each) GDI Costs (non-Theocracy): Land * 4 GDI Costs (Theocracy): Land * 8 Declare War Costs: Land * 10
GDI Penalty	Because of the defensive nature of the alliance, one side effect of GDI is 10% lower gains from your attacks.
Land Upkeep	If land is less than 1500A: Land Upkeep = Land^2 * 7/1500 + Land*3 If land is more than 1500A: Land Upkeep = Land * 10 Note that when Land = 1500, both formulas give the same upkeep.
Total Expense	Military Upkeep Costs + Alliance Upkeep Costs + Land Upkeep Costs
Networth	Troops*0.5+Jets*0.6+Turrets*0.6+Tanks*2+Spies*1+Tech*2+Land*45+Buildings*35+Money/20000+ Food/1000+Missles*2500+Pop/6+Oil/100
Food (Bushels)	Production round((farms*5.3 + empty_acres*0.4)*govt_food_bonus*agri_tech) govt_food_bonus = 1.15 for the fascism government and 1.00 for all other governments Consumption *Formula changed March 2010 Troops, jets, and turrets all consume 0.001 bushels each Tanks consume 0.003 bushels Spies consume 0.005 Civilians consume 0.03 March 16th, this formula is in effect in the express, team, and primary servers Decay = Bushels_on_hand*0.001

Note:  A good player does not have to know all the formulas.