Building Cost Calculator
Next price and cumulative cost for OpenFront cities, ports, factories, defense posts, SAMs, and warships — including the shared port/factory counter.
Next one costs–
Total for the batch–
Price after the batch–
Ports and factories share a counter. Build 3 ports and your first factory is already priced as the 4th building.
Cost formulas (in gold)
City / Port / Factory = min(1000000, 2^n * 125000)
Defense Post = min(250000, (n+1) * 50000)
SAM Launcher = min(3000000, (n+1) * 1500000)
Warship = min(1000000, (n+1) * 250000)
n = how many you already own · Factory and Port share the same nPorts and factories share one counter. Build three ports and your first factory is already priced as the fourth building. Expanding ports without a plan makes the switch to a factory economy expensive.