Does the calculator use hidden game data?

No. It uses only the values you enter from your current session.

What happens when an income gain is zero?

Payback stays unavailable rather than displaying zero, Infinity, or a recommendation based on invalid math.

Which option does A/B mode recommend?

It prefers the shortest valid payback, then uses horizon net when valid payback values tie.

No. The calculator runs in your browser and does not submit or store these values.

Pit strategy tool

Run a Pit Stop Upgrade Calculator

Compare two upgrade options with your own cost and cash-per-second values. Missing or invalid math stays unavailable instead of turning into a misleading zero.

Quick answer

A/B upgrade calculator with two player-entered options

A two option calculator compares current and post upgrade income, cost, saved cash, and horizon, returning gain, affordability, payback, horizon net, and comparison. Zero or negative gain stays unavailable.

Live pit board

Upgrade ROI & payback

Enter the numbers shown in your session. The calculator never fills in hidden prices or income rates for you.

Comparison horizon (minutes)

Pit lane

Option A

Current cash / secYour rate before buyingCash / sec after upgradeThe rate shown after buyingUpgrade costFull purchase priceCash already savedUse 0 if starting fresh

Gain / sec: —
Still needed: —
Affordable in: —
Payback: —
Horizon net: —

Pit lane

Option B

Current cash / secYour rate before buyingCash / sec after upgradeThe rate shown after buyingUpgrade costFull purchase priceCash already savedUse 0 if starting fresh

Gain / sec: —
Still needed: —
Affordable in: —
Payback: —
Horizon net: —

Crew callComplete both option cards to compare them.

Shorter payback is only one criterion. Utility, unlocks, and how long you plan to keep playing can change the right choice.

Math: gain = after − current; payback = cost ÷ positive gain; horizon net = gain × minutes × 60 − cost.