Building / Furnace calculator
Furnace, 3 camps, Infirmary, Research Center, and Embassy upgrade costs from community tables (whiteoutdata). Confirm the in-game upgrade preview before spending speedups.
schema v4 · 2026-07-16 · sample data — verify in-game · community-wiki
Enter total construction speed % (VIP + research + heroes + alliance). Time is divided by (1 + bonus/100).
Adjust levels to see totals.