Used 35 litres over 500 km? Calculate litres per 100 kilometres
Fuel consumed must be paired with the distance covered during the same interval. Tank capacity or the amount paid is not a substitute for fuel volume.
Fuel consumption →Normalize the consumption to 100 km
Calculate 35 / 500 × 100 = 7 L/100km. At an illustrative price of 1.8 currency units per litre, the fuel cost is 35 × 1.8 = 63. Consumption and cost are different outputs: a price change affects cost but does not alter the litres-per-distance ratio for that recorded journey.
Match the fuel and distance records
If refueling volume is being used to estimate consumption, the starting and ending fuel-level basis must be comparable. Combining several recorded refills can help reduce the influence of one inconsistent fill. Do not treat a nominal 50-litre tank capacity as fuel already consumed, or assume a fuel-gauge segment provides a precise volume measurement.
Keep driving conditions with the comparison
Traffic, load, weather and driving conditions can affect observed consumption. One interval need not represent the long-term average. To combine journeys with different distances, add the total litres and kilometres and recalculate, rather than averaging the displayed consumption figures equally. The unit converter can align records from different unit systems, while percentage change can describe a comparison only after the underlying measurements are made comparable.
Try the calculators
- Fuel consumption
Estimate fuel consumption and cost.
- Unit converter
Convert length, mass, area, volume, speed and data size.
- Percentage change
Measure the change between two values.