Fuel consumption calculator
L/100km = litres ÷ kilometres × 100. Enter the litres from your last receipt and the kilometres driven since that fill.
Example: 48.2 L receipt
ExampleFuel consumption
7.9 L/100km
$17.67 per 100 km (17.7 c/km) · 12.70 km/L · 35.9 UK MPG
- Litres used
- 48.2 L
- Distance driven
- 612 km
- Per 100 km
- 100
- Fuel consumption
- 7.9 L/100km
- U91 national average
- 223.7 c/L
- Cents in a dollar
- 100
- Fuel cost per 100 km
- $17.67
Example: 48.2 L receipt. Fuel consumption. 7.9 L/100km. $17.67 per 100 km (17.7 c/km) · 12.70 km/L · 35.9 UK MPG
Fuel consumption · $17.67 per 100 km · 12.70 km/L7.9 L/100km
DetailsFuel consumption examples
These examples use the same formula as the calculator. Replace every figure with the litres and distance from your last fill.
| Litres used | Kilometres driven | L/100km | km/L |
|---|---|---|---|
| 40.0 L | 500 km | 8.0 | 12.5 |
| 48.2 L | 612 km | 7.9 | 12.7 |
| 55.0 L | 680 km | 8.1 | 12.4 |
Formula: L/100km = litres ÷ kilometres × 100. km/L = kilometres ÷ litres.
Use the last fill, not a brochure figure
Copy the receipt litres
Enter the litres printed on the bowser receipt. Rounding to a whole number moves the L/100km result more than a small odometer error.
Measure the distance on that tank
Reset the trip meter at the fill, or subtract the previous odometer reading from the current one. Do not enter the next trip you are planning.
Treat it as this tank only
Traffic, hills, load and air-con change the next fill. Average a few tanks before using the figure in the trip cost calculator.
Keep the units consistent
Litres stay litres. Distance uses kilometres or miles depending on the site. The result is always shown as L/100km.
Fuel map
Check a station price before you go
Open the fuel map for reported prices, update times and directions near you or along your route.
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Free on iPhone and Android: price alerts, saved stations, the forecast.
Fuel consumption calculator questions
How do I calculate fuel consumption?
Fill the tank, note the kilometres until the next fill, then divide the litres that fill takes by the kilometres driven and multiply by 100. 40 litres over 500 km is 8.0 L/100km.
What does my fuel consumption cost per 100 km?
Multiply the L/100km by the price per litre. At 8.0 L/100km and 200.0c a litre, 100 km costs 8.0 × 200.0 ÷ 100 = $16.00. The calculator uses the national average for the grade you choose, or a price you enter.
What should I enter for litres?
Use the litres printed on the receipt or bowser. A guessed round number will move the L/100km result more than a small odometer rounding error.
How do I measure the distance?
Reset the trip meter at the fill, or subtract the previous odometer reading from the current one. Include the distance driven on that tank, not the trip you are planning next.
Why is this different from the handbook figure?
Handbook economy is a test-cycle number. This result is only this tank, including traffic, hills, load, air-con and how you drove. Average a few fills before using it in the trip cost calculator.