Fuel Cost Calculator
Updated on 22 Oct 2026 · Checked by Aotob
There and back, 500 miles costs about $57.14 in fuel.
That is 17.9 gallons at $3.20 a gallon.
Fuel cost
$57.14
Every $0.10 on the fuel price adds $1.79 to this trip.
Show the working
500 ÷ 28 mpg = 17.86 gal × 3.20 = 57.14
Cost at other fuel prices
| Price a gallon | Trip cost |
|---|---|
| 2.56 | 45.71 |
| 2.88 | 51.43 |
| 3.20 | 57.14 |
| 3.52 | 62.86 |
| 3.84 | 68.57 |
Questions people ask
How is fuel cost worked out?
Distance ÷ miles per gallon × price per gallon, or distance × litres per 100 km ÷ 100 × price per litre.
Why are UK mpg figures higher?
A UK (imperial) gallon is 4.546 litres; a US gallon is 3.785. The same car does about 20% more mpg in UK gallons.
How can I use less fuel?
Keep tyres pumped up, take roof boxes off, and drive steadily: 70 mph uses about 10% more than 60.
Updated 22 Oct 2026Source: Standard maths; typical prices are averages, checked October 2026Checked by AotobReal-world economy is often 10% to 20% worse than official figures.Report an issue