Fuel Cost per Mile vs per Kilometer Calculator
Convert your fuel price and fuel economy into the cost per mile and cost per kilometer, plus litres per 100 km and annual fuel spend.
Compare Your Options And Get Clear Answers
Convert your fuel price and fuel economy into the cost per mile and cost per kilometer, plus litres per 100 km and annual fuel spend.
Fuel Cost per Mile vs per Kilometer Estimator
Enter your numbers below for an instant estimate.
How It Works
Key concepts behind this calculator
Cost per Mile
Price per gallon divided by miles per gallon.
Convert to Kilometers
Divide cost per mile by 1.609 to get cost per kilometer.
Annual Cost
Cost per mile multiplied by the miles driven each year.
Use As A Guide
Results are estimates based on your inputs. Check real quotes, rates and professional advice before deciding.
Fuel Economy Conversions
Approximate equivalents between mpg and metric units.
| US mpg | L/100 km | km/L | Cost per mile at $3.50 |
|---|---|---|---|
| 20 | 11.8 | 8.5 | $0.18 |
| 25 | 9.4 | 10.6 | $0.14 |
| 30 | 7.8 | 12.8 | $0.12 |
| 40 | 5.9 | 17.0 | $0.09 |
| 15 | 15.7 | 6.4 | $0.23 |
| Rule of Thumb | L/100 km = 235 ÷ mpg | 1 mile = 1.609 km | 1 US gal = 3.785 L |
Fuel Cost per Calculator FAQ
Answers to common questions about this calculator.
Divide 235.215 by the mpg figure (US gallons). For example 28 mpg is about 8.4 L/100 km.
No. A UK imperial gallon is about 4.546 litres and a US gallon is 3.785 litres, so mpg values differ between the two.
Divide the cost per mile by 1.609344.
No. It covers fuel only. Insurance, servicing, tyres and depreciation add to the true cost.