When to use this calculator
A per-kilometre amount makes it easier to compare routes or fuel scenarios on the same distance basis.
Explore the fuel use & cost calculators for other questions in this topic. For a related calculation, use the Fuel Cost Savings Calculator: Compare fuel spending before and after a change in consumption.
PUTTING IT INTO PRACTICE
Fuel Cost Per Kilometre: a worked example
The values below are an illustrative example, not a recommendation. Replace them with measurements or assumptions that match your question.
| Input | Example value |
|---|---|
| Consumption (L/100 km) | 8 |
| Fuel price per litre | 1.5 |
| Result | 0.12 per km |
- Check the input labels and enter the example values above.
- Apply the relationship: Cost per km = consumption × price/100.
- The result is 0.12 per km, rounded for display.
How to interpret your result
Excludes vehicle ownership, servicing, parking and tolls.
State the fuel-economy convention: UK imperial and US liquid gallons have different volumes. L/100 km is consumption, so lower values indicate less fuel used per distance. Input prices are scenario values.
Frequently asked questions
Are UK MPG and US MPG comparable without conversion?
No. Both use miles but different gallon volumes, so their numerical values differ for the same vehicle consumption.
When is the fuel cost per kilometre calculator useful?
A per-kilometre amount makes it easier to compare routes or fuel scenarios on the same distance basis.
How do I use the fuel cost per kilometre calculator?
Enter consumption (l/100 km), fuel price per litre. The result updates automatically. Use the units shown beside each input; the example values illustrate the method.
Which formula does this calculator use?
Cost per km = consumption × price/100.
What should I check before using the result?
Excludes vehicle ownership, servicing, parking and tolls.
How are results rounded?
Scalar numbers display up to six decimal places, with scientific notation for very large or small values. Text, fraction, date and schedule outputs use the format described on the tool. Intermediate calculations use JavaScript floating-point arithmetic. Keep sensible precision for your measurements.
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