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
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 = 이미 지은 개수 (port 와 factory 는 n 을 공유)Ports 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.