Game Formulas

It needs to be determined what formulas are no longer accurate

This page contains a listing of various formulae for Earth Empires.

Basic Formulae

• Networth

• Maximum population
• Population growth
• Maximum per capita income
• Per capita income growth

Please note, a lot of these are old formulas, and need to be updated. This list does not include every formula either. Those highlighted in green are as accurate as possible.

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)
Rebuilding Cost
Oil Consumption	(Troops + Jets + Tanks)/25
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 * 0.002 (0.2% of NW each) Offensive Allies: OffAllies * Networth * 0.002 (0.2% of NW each) Intelligence Allies: IntelAllies * Networth * 0.0015 (0.15% of NW each) Research Allies: ResAllies * Networth * 0.0015 (0.15% of NW each) Trade Pacts: TradePacts * Networth * 0.0005 (0.05% of NW each) GDI Costs (Theocracy): Land * 8 GDI Costs (All Others): Land * 4 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	Land Upkeep = (Land ^ 2) * (7/1500) + (Land * 3)
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 Production	(Farms * 5.3) + (Unused Acres*0.4) * GovFoodBonus * AgriTech
Food Consumption	(Pop * 0.03) + (Spies * 0.005) + ((Troops + Jets + Turrets) * 0.001) + (Tanks * 0.003)
Food Decay	Bushels * 0.001
Technology Percentages	BaseTech + (MaxTech - BaseTech) * GovtBonus * (1 - Exp(-Effective * TechPoints / (C1 + (C2* Land)))) See techology for more info
Military Formulas
SPAL (Spies Per Acre Land)	(Spies*GovtBonus*Spytech + 1/4 AlliesSpies)/Land
Standard Strike Strength	WeaponsTech% * GovtBonus * Readiness * (Troops + Jets*2 + Tanks*4) + min(WeaponsTech% * GovtBonus * Readiness * (Troops + Jets*2 + Tanks*4), 0.25 * (AlliesTroops + AlliesJets*2 + AlliesTanks*4)) where min(value1,value2) = lower of the two values

Most formulae use standard rounding, but some, like networth, use truncation.

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