Is the calculator exact?

The calculator is a starter decision helper. Add formulas, tables, and game-specific inputs when exact rates are available.

Primary tool

My Giant Sandwich Upgrade Calculator

Enter the numbers you can see in-game to compare one upgrade's payback time and planned time-away earnings. No hidden rates are assumed.

Your in-game numbers

Compare one upgrade

Current cashThe cash number you can see now.Upgrade costThe price shown by the next upgrade.Current income per minuteYour observed current rate.Income per minute after upgradeEnter only the rate shown or measured in your game.Minutes you plan to be awayUse your planned break or offline period.

Your estimate

Upgrade payback and time away

You can afford this upgrade now.

Income change: 0 / min
Payback: No positive payback
Current away earnings: 0
Upgraded away earnings: 0

The math only compares the values you entered: cost ÷ added income, plus each rate × planned minutes away. It is not an official game formula or rate claim.