Sim racing fuel calculator
Plan lap or timed races with a transparent fuel estimate. Separate race demand, formation fuel, reserve, tank capacity, and possible extra laps.
Race format
Scheduled race laps
Whole racing laps
Fuel used per lap
Litres or consistent game units
Tank capacity
Maximum usable fuel
Current fuel
Fuel already in the car
Safety reserve
Extra laps of margin
Formation allowance
Equivalent laps used before the start
Load increment
Rounds upward to 0.1, 1, etc.
Recommended starting load
50.4
45.4 to add from current fuel
Predicted laps
20
Exact race fuel
48.0
Tank range
41.7 laps
Minimum stops
0
How to calculate race fuel
Exact race demand is race laps multiplied by representative fuel use per lap. The recommended load then adds your separate formation and safety allowances and always rounds upward to the selected fuel increment. For timed races, predicted laps are rounded up; enable the extra-lap option only when the event rules allow another lap to begin after time expires.
How much reserve should you use?
One extra lap is a practical starting point, but it is not universal. Measure several clean, representative laps with the same car, setup, fuel multiplier, and conditions. Keep formation use separate so the result explains every assumption. Tank-capacity stop counts are feasibility estimates; optimal strategy also depends on tyre rules, refuelling rate, pit loss, and weather.
