This calculator is arithmetic on a table, not a live mixer. Enter quantities from your own Survive Lava for Animals session. It will not click the shop.
Upgrade payback
Upgrade payback
Estimate how long a shop upgrade takes to pay for itself. Type the cash price you see in your own shop and the extra cash that upgrade adds each income cycle. The numbers already in the boxes are a demo so the form can run. They are not Survive Lava for Animals prices.
Payback cycles = upgrade cost ÷ extra profit per cycle, rounded up.
Shop prices and animal income are not published as a fixed table, and they can change after the 2 October 2026 experience update. Replace every demo number with the price and income change on your plot before you trust the result. This does not read your account.
