Race Fuel & Pit-Stop Strategy Calculator

When to use it

• Compare how a change in race laps affects minimum fuel stops before committing to parts, setup, or strategy changes.
• Check a workshop, dyno, simulator, or trackside spreadsheet result using a transparent formula: Ceiling(total fuel ÷ usable stint fuel) − 1.
• Use the result to plan scenarios, then update it with live timing, weather, safety-car probability, fuel logs, tyre wear, and any sporting regulations that affect refuelling or pit timing.

How to use it

1. Enter race laps as a plain number; the default value shown is 50.
2. Enter fuel per lap in L; the default value shown is 3.2 L.
3. Enter usable tank capacity in L; the default value shown is 60 L.
4. Enter reserve per stint in L; the default value shown is 2 L.

How to read the result

Minimum fuel stops is shown in stops. Use the number as a calculated reference point, then compare it with measured data from the car, the part supplier, or the race environment. A mathematically clean answer can still be unsuitable if the inputs are estimated, rounded, measured under different conditions, or outside the normal range for the vehicle.

Assumptions and checks

• Assumes the race starts with a full usable tank and equal fuel windows; tyre, safety-car and refuelling rules are not modelled.
• Changing race laps and fuel per lap together can move the answer in ways that are easy to miss, so make related setup changes deliberately.
• Add a reserve for formation laps, safety-car periods, traffic, and unexpected consumption changes.
• Check the race rules before assuming refuelling, stint length, or pit-stop timing is allowed.
• Compare estimates with logged data from the same car, driver, tyre, and circuit where possible.