A sim racing fuel calculator tells you exactly how much fuel to load for any race length, accounting for consumption per lap and a safety reserve. Too little fuel means you run out before the finish; too much weighs the car down. Get your fuel load exactly right every race.
Game & Car Preset
Selecting a preset fills in fuel consumption below. All values are approximations — your actual usage may differ.
Race Length
Fuel Consumption
Leave blank to skip pit stop planning
Fuel Strategy
Fuel Consumption Reference (liters per lap, typical values)
| Game / Car | Fuel/Lap (L) | Notes |
|---|---|---|
| iRacing — Mazda MX-5 | 1.0–1.2 | Short circuits vary |
| iRacing — Skip Barber | 1.5–2.0 | Entry-level open wheel |
| iRacing — GT3 Class | 2.0–3.0 | Car and circuit dependent |
| ACC — GT3 (Nürburgring) | 3.5–4.5 | Longer lap = more fuel |
| ACC — GT3 (Monza) | 2.5–3.0 | High-speed track |
| F1 24 — Modern F1 Car | 0.9–1.2 | Hybrid efficiency |
| GT7 — Gr.3 | 2.0–3.5 | Varies by car model |
How to Use the Sim Racing Fuel Calculator
This sim racing fuel calculator removes the guesswork from pre-race fuel loading. Whether you're doing a short sprint or a long endurance event, knowing your exact fuel load prevents two scenarios every sim racer hates: running out of fuel on the final lap, or carrying unnecessary fuel that slows the car down for the entire race.
Step 1: Select a Game Preset (Optional)
Choose a preset to auto-populate the fuel consumption field with typical values for that game and car class. These are approximations — actual consumption varies by circuit (longer laps = more fuel), driving style (aggressive throttle = more fuel), and specific car model within a class.
Step 2: Enter Race Length
Enter race length in laps or convert from a timed race. For a timed race, also enter your average lap time so the calculator can estimate total laps. Add a few seconds to your practice lap time as average — in a race, pace cars, safety cars, or slower early laps will extend your average.
Step 3: Set Fuel Consumption and Reserve
The most accurate fuel consumption comes from your own practice data — check your in-game telemetry or fuel display after a stint. Enter that value in liters or gallons (toggle at top). Add a safety reserve of 1-2 extra laps for sprint races. Endurance races with safety car uncertainty benefit from 2-3 extra laps of reserve.
Step 4: Check Pit Stop Requirements
If your total fuel load exceeds your car's maximum tank capacity, you'll need to plan a pit stop. Enter the max tank size to see pit stop planning. The calculator shows when to pit and how much fuel to take to reach the finish with your reserve intact.
Frequently Asked Questions
Is this sim racing fuel calculator free?
Yes, completely free with no signup. All calculations run locally in your browser.
How much fuel do I need in iRacing?
Fuel consumption in iRacing varies dramatically by car and track. A Mazda MX-5 uses about 1.0-1.2L per lap. Skip Barber Formula uses about 1.5-2.0L. NASCAR Cup cars use 4-6L per lap. For your first race, use the built-in iRacing fuel wizard which calculates fuel based on your practice lap data — that's more accurate than any preset.
How much fuel does an ACC GT3 car use per lap?
Assetto Corsa Competizione GT3 cars average about 2.2-2.8L per lap depending on the car and circuit. Monza is higher (2.5-3.0L) due to heavy throttle use; tight circuits like Brands Hatch use less (2.0-2.4L). The Ferrari 488 GT3 tends to use slightly more than average; the Lamborghini Huracán is among the most fuel-efficient.
What is a safety reserve in fuel strategy?
A safety reserve is extra fuel beyond what's theoretically needed. In real motorsport, teams add 1-2 extra laps worth of fuel to account for safety cars, varied driving pace, or fuel flow inconsistencies. In sim racing, a 1-lap reserve is standard for sprint races; endurance races often carry 2 extra laps to account for timing variability.
What is the maximum fuel tank in ACC?
Most ACC GT3 cars have maximum tanks of 100-120 liters. Some cars (like the Porsche 992 GT3R) can carry more. If your calculated fuel load exceeds the tank size, you'll need to plan a pit stop. This calculator shows when pit stops become necessary.