This calculator is arithmetic on a table, not a live mixer. Enter quantities from your own RoFront [World PvP] session. It will not click the shop.
Upgrade payback
Building gold payback
Estimate how long a gold building takes to pay for itself. The default cost is the reported 125,000 gold first tier of a City, Factory, or Port. Extra gold per cycle is not a published RoFront income rate. Replace 1000 with the extra gold you actually see after you build. One minute is only the cycle length you chose to type, not a confirmed game tick.
Payback cycles = upgrade cost ÷ extra profit per cycle, rounded up.
125000 matches the reported first tier for a City, Factory, or Port. 1000 extra gold is a placeholder so the form can run. It is not a city income stat. Defense posts start at 50000 gold, warships at 250000, missile silos at 1000000, and the first SAM launcher at 1500000. The result assumes the extra income stays constant and ignores troop losses.
![RoFront [World PvP] Calculator](/media/optimized/1d3bbc99b51cf0c803bf953f-960.webp)