Fuel economy converter tools
A collection of the most used and helpful fuel economy converter tools.
Popular Tools
Easily convert Miles per Liter (mi/L) fuel economy units to Gallons US per 100 Miles (gal US/100 mi) with this easy converter.
Easily convert Liters per 100 Kilometers (L/100 km) fuel economy units to Miles per Gallon US (mpg US) with this easy converter.
Easily convert Gallons UK per 100 Miles (gal UK/100 mi) fuel economy units to Miles per Liter (mi/L) with this easy converter.
Easily convert Kilometers per Liter (km/L) fuel economy units to Miles per Gallon US (mpg US) with this easy converter.
Easily convert Kilometers per Liter (km/L) fuel economy units to Gallons UK per 100 Miles (gal UK/100 mi) with this easy converter.
Easily convert Miles per Gallon US (mpg US) fuel economy units to Liters per 100 Kilometers (L/100 km) with this easy converter.
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A collection of the most used and helpful fuel economy converter tools.
Easily convert Kilometers per Liter (km/L) fuel economy units to Miles per Gallon US (mpg US) with this easy converter.
Easily convert Kilometers per Liter (km/L) fuel economy units to Miles per Gallon UK (mpg UK) with this easy converter.
Easily convert Kilometers per Liter (km/L) fuel economy units to Miles per Liter (mi/L) with this easy converter.
Easily convert Kilometers per Liter (km/L) fuel economy units to Liters per 100 Kilometers (L/100 km) with this easy converter.
Easily convert Kilometers per Liter (km/L) fuel economy units to Gallons US per 100 Miles (gal US/100 mi) with this easy converter.
Easily convert Kilometers per Liter (km/L) fuel economy units to Gallons UK per 100 Miles (gal UK/100 mi) with this easy converter.
Easily convert Miles per Gallon US (mpg US) fuel economy units to Kilometers per Liter (km/L) with this easy converter.
Easily convert Miles per Gallon US (mpg US) fuel economy units to Miles per Gallon UK (mpg UK) with this easy converter.
Easily convert Miles per Gallon US (mpg US) fuel economy units to Miles per Liter (mi/L) with this easy converter.
Easily convert Miles per Gallon US (mpg US) fuel economy units to Liters per 100 Kilometers (L/100 km) with this easy converter.
Easily convert Miles per Gallon US (mpg US) fuel economy units to Gallons US per 100 Miles (gal US/100 mi) with this easy converter.
Easily convert Miles per Gallon US (mpg US) fuel economy units to Gallons UK per 100 Miles (gal UK/100 mi) with this easy converter.
Easily convert Miles per Gallon UK (mpg UK) fuel economy units to Kilometers per Liter (km/L) with this easy converter.
Easily convert Miles per Gallon UK (mpg UK) fuel economy units to Miles per Gallon US (mpg US) with this easy converter.
Easily convert Miles per Gallon UK (mpg UK) fuel economy units to Miles per Liter (mi/L) with this easy converter.
Easily convert Miles per Gallon UK (mpg UK) fuel economy units to Liters per 100 Kilometers (L/100 km) with this easy converter.
Easily convert Miles per Gallon UK (mpg UK) fuel economy units to Gallons US per 100 Miles (gal US/100 mi) with this easy converter.
Easily convert Miles per Gallon UK (mpg UK) fuel economy units to Gallons UK per 100 Miles (gal UK/100 mi) with this easy converter.
Easily convert Miles per Liter (mi/L) fuel economy units to Kilometers per Liter (km/L) with this easy converter.
Easily convert Miles per Liter (mi/L) fuel economy units to Miles per Gallon US (mpg US) with this easy converter.
Easily convert Miles per Liter (mi/L) fuel economy units to Miles per Gallon UK (mpg UK) with this easy converter.
Easily convert Miles per Liter (mi/L) fuel economy units to Liters per 100 Kilometers (L/100 km) with this easy converter.
Easily convert Miles per Liter (mi/L) fuel economy units to Gallons US per 100 Miles (gal US/100 mi) with this easy converter.
Easily convert Miles per Liter (mi/L) fuel economy units to Gallons UK per 100 Miles (gal UK/100 mi) with this easy converter.
Easily convert Liters per 100 Kilometers (L/100 km) fuel economy units to Kilometers per Liter (km/L) with this easy converter.
Easily convert Liters per 100 Kilometers (L/100 km) fuel economy units to Miles per Gallon US (mpg US) with this easy converter.
Easily convert Liters per 100 Kilometers (L/100 km) fuel economy units to Miles per Gallon UK (mpg UK) with this easy converter.
Easily convert Liters per 100 Kilometers (L/100 km) fuel economy units to Miles per Liter (mi/L) with this easy converter.
Easily convert Liters per 100 Kilometers (L/100 km) fuel economy units to Gallons US per 100 Miles (gal US/100 mi) with this easy converter.
Easily convert Liters per 100 Kilometers (L/100 km) fuel economy units to Gallons UK per 100 Miles (gal UK/100 mi) with this easy converter.
Easily convert Gallons US per 100 Miles (gal US/100 mi) fuel economy units to Kilometers per Liter (km/L) with this easy converter.
Easily convert Gallons US per 100 Miles (gal US/100 mi) fuel economy units to Miles per Gallon US (mpg US) with this easy converter.
Easily convert Gallons US per 100 Miles (gal US/100 mi) fuel economy units to Miles per Gallon UK (mpg UK) with this easy converter.
Easily convert Gallons US per 100 Miles (gal US/100 mi) fuel economy units to Miles per Liter (mi/L) with this easy converter.
Easily convert Gallons US per 100 Miles (gal US/100 mi) fuel economy units to Liters per 100 Kilometers (L/100 km) with this easy converter.
Easily convert Gallons US per 100 Miles (gal US/100 mi) fuel economy units to Gallons UK per 100 Miles (gal UK/100 mi) with this easy converter.
Easily convert Gallons UK per 100 Miles (gal UK/100 mi) fuel economy units to Kilometers per Liter (km/L) with this easy converter.
Easily convert Gallons UK per 100 Miles (gal UK/100 mi) fuel economy units to Miles per Gallon US (mpg US) with this easy converter.
Easily convert Gallons UK per 100 Miles (gal UK/100 mi) fuel economy units to Miles per Gallon UK (mpg UK) with this easy converter.
Easily convert Gallons UK per 100 Miles (gal UK/100 mi) fuel economy units to Miles per Liter (mi/L) with this easy converter.
Easily convert Gallons UK per 100 Miles (gal UK/100 mi) fuel economy units to Liters per 100 Kilometers (L/100 km) with this easy converter.
Easily convert Gallons UK per 100 Miles (gal UK/100 mi) fuel economy units to Gallons US per 100 Miles (gal US/100 mi) with this easy converter.
What Are Fuel Economy Converter Tools?
Fuel economy converters translate consumption figures between the world's incompatible systems: miles per gallon (US), miles per gallon (UK), liters per 100 km, and kilometers per liter. If you have ever tried to compare an American car's MPG with a European car's L/100km, you know why these exist.
The Gallon Trap
A US gallon (3.785 L) and a UK imperial gallon (4.546 L) differ by 20% — so "30 MPG" means two completely different things depending on which side of the Atlantic you are on. 30 US MPG ≈ 25 UK MPG ≈ 7.8 L/100km. Always check which gallon a figure uses before comparing.
MPG vs L/100km: Why Lower Is Better (Sometimes)
MPG measures distance per fuel (higher = better). L/100km measures fuel per distance (lower = better). The L/100km scale is linear — dropping from 10 to 8 L/100km saves exactly as much fuel as dropping from 8 to 6 — while MPG improvements have diminishing returns. This is why engineers prefer L/100km for real comparisons.
Frequently Asked Questions
How do I convert MPG to L/100km?
Divide 235.2 by the US MPG figure: 30 MPG → 7.84 L/100km. (For UK MPG, divide 282.5 instead.)
Why does my real fuel economy differ from the official figure?
Official figures come from lab test cycles. Real driving adds traffic, air conditioning, hills, cold starts and your right foot. Expect 15–30% worse in the real world.
Does driving slower really save fuel?
Yes, significantly. Aerodynamic drag rises with the square of speed — cruising at 120 km/h instead of 100 km/h typically burns 15–20% more fuel for the same trip.