This calculator is arithmetic on a table, not a live mixer. Enter quantities from your own [UPDATE] Zombie Air Force ✈️ session. It will not click the shop.
Upgrade payback
Upgrade payback planner
Estimate how many runs it takes for one displayed Credit upgrade to pay for itself. You supply the in-game price and the extra Credits you expect from a run you can already clear.
Payback cycles = upgrade cost ÷ extra profit per cycle, rounded up.
The sample numbers are blanks for the form, not Armoury prices. Type the Credit cost shown on the upgrade you are considering, then your own estimate of how many extra Credits one repeatable run would pay if that upgrade is the only change. The result is a payback estimate in runs and minutes. It does not read your balance, and it does not know weekend, group, or code boosts unless you already folded them into the extra-Credits figure.
![[UPDATE] Zombie Air Force ✈️ Calculator](/media/optimized/a12357f848972d1a0af06b42-960.webp)