Earth is a game of numbers. Most numbers are regulated by formulas.
Here they are:
| Net Worth (NW) | Troops * 0.5 + Jets * 0.6 + Turrets * 0.6 + Tanks * 2 + Spies * 1 + TotalTech * 2 + Land * 45 + Buildings * 35 + Money/20000 + Food/4000 + Missiles * 2500 + Pop/6 + Oil/100 |
| Per Capita Income (PCI) | 22.5 * (1 - Taxrate) * (1 + (Networth/Land)/90000) * (1 + 2 * Ent/Land) * BusTech * GvtPCI |
| Maximum Population | 2 * (6 * Land) * (1 - 0.95 * Tax) * (1 + 2 * Res/Land) * ResTech |
| Revenue | PCI * Pop * Taxrate |
| Construction Cost | 3 * Land + 1500 |
| Destruction Cost | 1/5 * (3 * Land + 1500) |
| Food Production | (Farms * 5.3 + EmptyAcres * 0.4) * GvtFood * AgrTech |
| Food Consumption | Troops * 0.00048 + (Jets + Turrets) * 0.00032 + Tanks * 0.00132 + Spies * 0.0016 + Pop * 0.0216 |
| Industrial Production | Troops: Ind * (Troop% * 1.88) * IndTech * IndGvtBonus
Jets: Ind * (Jet% * 1.88) * IndTech * IndGvtBonus Turrets: Ind * (Turret% * 1.88) * IndTech * IndGvtBonus Tanks: Ind * (Tank% * 0.4) * IndTech * IndGvtBonus Spies: Ind * (Spy% * 0.6) * IndTech * IndGvtBonus |
| Tech Per Turn | 0.34 * Labs * (1 - (1 - Labs/Land)/2) + 3 |
| Buildings Per Turn | (CS/4 + 5)* GvtConstr |
| Private Market Replenishment Per Turn | Troops: 3.5 * Land
Jets: 2 * Land Turrets: 2 * Land Tanks: Land |
| Private Market Costs | Troops: 144 * GvtMilCost * MilTech * (1 - 0.23333 * MilBases/Land)
Jets: 192 * GvtMilCost * MilTech * (1 - 0.23333 * MilBases/Land) Turrets: 210 * GvtMilCost * MilTech * (1 - 0.23333 * MilBases/Land) Tanks: 588 * GvtMilCost * MilTech * (1 - 0.23333 * MilBases/Land) |
| Military Upkeep | Troops: Troops * 0.12 * MilTech * (1 + Networth/30000000) * Constant
Jets: Jets * 0.13 * MilTech * (1 + Networth/30000000) * Constant Turrets: Turrets * 0.17 * MilTech * (1 + Networth/30000000) * Constant Tanks: Tanks * 0.551 * MilTech * (1 + Networth/30000000) * Constant Spies: Spies * 1.001 * MilTech * (1 + Networth/30000000) * Constant Constant: If (Milbases/Land + 0.005) < 0.3: (1 - 1.3 * (Bases/Land + 0.005)) Else: 0.61 |
| Max Tech % (for governments with no tech bonus) | Military: 87% of Normal
Medical: 67% of Normal Business: 180% of Normal Residential: 180% of Normal Agricultural: 225% of Normal Military Strategy: 135% of Normal Warfare: 5.000% Per Turn Weapons: 135% of Normal Industrial: 140.00% of Normal Spy: 150.00% of Normal SDI: 90.00% |
| Max Tech % (for Demo) | Military: 86% of Normal
Medical: 65% of Normal Business: 188% of Normal Residential: 188% of Normal Agricultural: 238% of Normal Military Strategy: 138% of Normal Warfare: 5.480% Per Turn Weapons: 155% of Normal Industrial: 144% of Normal Spy: 155% of Normal SDI: 98.90% |
| Max Tech % (for Theo) | Military: 91% of Normal
Medical: 75% of Normal Business: 152% of Normal Residential: 152% of Normal Agricultural: 181% of Normal Military Strategy: 123% of Normal Warfare: 3.320% Per Turn Weapons: 133% of Normal Industrial: 126% of Normal Spy: 132.50% of Normal SDI: 58.85% |
| Tech % to Tech Points | Click here to use the calculator. |
| Tech Points to Tech % | Click here to use the calculator. |
| Alliance Costs | Defensive Allies: Networth * 0.001
Offensive Allies: Networth * 0.001 Intelligence Allies: Networth * 0.00075 Research Allies: Networth * 0.00075 Trade Pacts: Networth * 0.00025 |
| GDI Costs | Theocracy: Land * 8
All other Gov't: Land * 4 |
| Land Upkeep | Land * 10 |
| Total Expense | Land Upkeep + GDI Costs + Military Upkeep + Alliance Costs |
Note: A good player does not have to know all the formulas. However, you should know the NW and BPT formula.