Convert fuel economy between MPG (US & UK), km/L and L/100km, then estimate fuel cost for any distance. Free, instant and 100% private.
| 1 MPG (US) | = 235.21 L/100km ÷ MPG |
| 1 MPG (UK) | = 282.48 L/100km ÷ MPG |
| 1 km/L | = 100 ÷ L/100km |
| 1 US gallon | = 3.785 litres |
All conversions and cost estimates run locally in your browser. Nothing is uploaded to any server.
Edit any of MPG (US), MPG (UK), km/L or L/100km and every other unit updates instantly.
Enter distance and fuel price to see litres used and total cost — per 100 km or per mile.
Correctly handles the difference between US and Imperial gallons for accurate comparisons.
Explore our free calculator suite for finance and daily life.