This calculator is arithmetic on a table, not a live mixer. Enter quantities from your own Build a Haven session. It will not click the shop.
Upgrade payback
Stair payback estimator
Estimate how many of your own earning cycles it takes to earn back a 1000-coin stair project. Type the extra coins you believe shorter trips are worth. The form does not read your Haven or know a real stair profit.
Payback cycles = upgrade cost ÷ extra profit per cycle, rounded up.
The 1000-coin default matches the stair purchase reported at the wood pile. The six-hour build is waiting time, not a cycle in this formula. The 50-coin and 60-minute defaults are blank examples so the form has numbers to show. Replace them with your own lodge. They are not a measured stair bonus.
