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Fuel Cost & Range Calculator
Calculate how much a trip will cost in fuel, or find out how far you can travel on a set amount of fuel — in metric or imperial.
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Fuel needed
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Total cost
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Range
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Fuel cost
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How to Use This Calculator
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Choose a mode — Trip Cost to find out how much fuel will cost for a journey, or Fuel Range to find out how far you can go on a set amount of fuel
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Enter your distance (Trip Cost) or fuel amount (Fuel Range) — use the ⚙️ settings icon to switch between metric and imperial
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Enter your vehicle's fuel efficiency — check your car's handbook or fuel economy label (L/100km for metric, MPG for imperial)
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Set a fuel price — save it in ⚙️ Preferences so it pre-fills automatically every time you visit. Results update instantly as you type
Frequently Asked Questions
Divide your distance by your fuel efficiency to find the fuel needed, then multiply by the price per unit. Metric example: 300 km ÷ 100 × 8 L/100km = 24 litres. At $1.85/L → total = $44.40. Use the calculator above to do this instantly.
Multiply your fuel by your efficiency. Metric: distance (km) = fuel (L) ÷ L/100km × 100. Example: 40 L ÷ 8 = 500 km. Imperial: distance (miles) = fuel (gal) × mpg. Example: 10 gal × 35 mpg = 350 miles. Switch to the Fuel Range tab above.
L/100km means how many litres of fuel your car uses to travel 100 km. A lower number is better — 5 L/100km is very efficient, 8–10 L/100km is typical for a mid-size car, and 15+ is high consumption (e.g. large SUVs or 4x4s).
L/100km = 235.214 ÷ mpg. Example: 30 mpg → 235.214 ÷ 30 = 7.84 L/100km. To convert the other way: mpg = 235.214 ÷ L/100km.
A typical petrol car averages 7–10 L/100km (28–33 mpg). An efficient small car may achieve 5–6 L/100km. Hybrids often reach 4–5 L/100km. Your car's handbook or fuel economy label will give you the official figure to use here.
Maintain a steady highway speed — fuel efficiency peaks around 90–100 km/h for most cars. Keep tyres at the correct pressure, remove unnecessary weight (roof boxes, heavy luggage), use cruise control, and avoid hard acceleration. Filling up at cheaper stations rather than motorway services can also save a meaningful amount on longer trips.