Assetto Corsa Competizione Calculator

This calculator helps you convert lap times, fuel consumption and race length into clear, usable numbers: the total liters to take to the grid, how much fuel you’ll need for the final stint, and a simple pit-stop estimate. It works whether your event is defined by time (e.g., 45 minutes) or by a fixed lap count. The tool computes a minimum required fuel and an optional “recommended” amount that includes a safety buffer so you don’t run out if something unexpected happens.

Inputs explained

• Method (Race length vs Number of laps): If the event is described in minutes, use Race Length. If the organiser gives an exact lap count, choose Number of Laps. This changes how total laps are derived.
• Race length (minutes): Total race duration in minutes. Combined with your lap time it becomes total laps.
• Number of laps: Exact lap count when known.
• Lap time (MM:SS:MS): Average lap time. Use reasonable clean-air lap times (not qualifying laps if your race pace is slower).
• Fuel per lap (liters): Your car’s average consumption per lap. If you’re unsure, use telemetry or a few reference stints to estimate.
• Fuel tank capacity (liters): The maximum liters your car can start with this determines how many laps you can do per tank.
• Formation / Out lap fuel (optional): Extra liters for non-race laps (warm-up, out-lap). Toggle these on if you want the tool to include them in the total.

What the calculator outputs

• Total fuel needed – liters required to finish the race (minimum vs recommended).
• Fuel for final stint – how much to put in the tank for the last stint so you can finish without an extra stop.
• Predicted laps – number of laps the race will include (when calculating from race time).
• Pit stops – a simple estimate of how many stops you’ll need based on tank size and consumption.

How the numbers are calculated

1. Total laps: If using race length, the calculator divides race minutes by average lap time and rounds up to the next whole lap. If you entered laps, it uses that number directly.
2. Minimum fuel: total laps × fuel per lap plus formation/out-lap fuel if enabled.
3. Recommended fuel: Minimum fuel plus a small buffer (commonly 1–2 laps worth of fuel) to cover extra consumption, slow zones, or mistakes. You can toggle between minimum and recommended.
4. Laps per tank: floor(tank capacity / fuel per lap) determines how many laps you can normally do between pit stops.
5. Pit stops estimate: ceil(total laps / laps per tank) − 1 (zero or more stops).
6. Final-stint fuel: Fuel required for the last stint’s laps; the recommended mode adds the same buffer here so your final refuel isn’t marginal. The final-stint amount is capped at your tank capacity.

Racecraft & strategy tips from an experienced sim racer

• Always include a buffer. A 1–2 lap buffer (or the equivalent liters) is cheap insurance against safety cars, extra formation or cool-down laps, and slight pace variations.
• Use practice to tune fuel per lap. Fuel burn changes with setup, driving style and fuel load; measure it over a full stint and use that average.
• Factor tyre strategy and pit time. If a stop costs 20–30 seconds, sometimes carrying more fuel to avoid a stop is faster than pitting. Do the arithmetic.
• Adjust for traffic & pace targets. If you plan to push hard mid-race, expect higher consumption and add extra liters.
• Warm-up & cool-down. Include formation/out-lap fuel if you regularly perform a formation lap or an out-lap after pitting; those non-race laps still consume fuel.

Common mistakes

• Using qualifying laps as average race pace .
• Not measuring consumption over multiple laps.
• Ignoring safety-car possibilities.
• Exceeding tank capacity for final-stint estimates

FAQ

Q1. Should I use “minimum” or “recommended”?

A: If you want a risk-free strategy for online races where a DNF is costly, use Recommended. Minimum is useful for theoretical planning but carries risk.

Q2. Where do I get accurate fuel per lap numbers?

A: From practice stints and telemetry. Record fuel at pit in/out across a number of laps and divide the delta by laps run.

Q3. Can I use this for other sims (iRacing, rFactor)?

A: Yes, the same arithmetic applies. Just use the correct fuel units/consumption values from that sim.

Sources: PureTables.com, SimRacingSetup.com, TheSimGrid, Simracing.gp, SimRaceMarket.

Disclaimer: The calculator gives estimates based on your inputs. Actual fuel usage varies with setup, traffic, incidents and sim/game updates. Treat numbers as guidance for planning, not guaranteed amounts.