Miles per imperial gallon fuel economy unit.
Miles per imperial gallon to Liters per 100 kilometers Converter — mpg imp to L/100 km
Convert Miles per imperial gallon (mpg imp) to Liters per 100 kilometers (L/100 km) using the exact conversion factor (1 miles per imperial gallon = 282.4809363 liters per 100 kilometers). See the formula, worked examples, conversion table, unit comparison, history, and common uses.
Miles per imperial gallon to Liters per 100 kilometers converter
Converter
Fuel Economy Converter
Convert MPG, km/L, L/100 km, and related transport fuel economy units.
Context values
Some unit families need one extra value for a physically accurate result.
Liters per 100 kilometers fuel economy unit.
Normalize fuel economy to distance per volume, inverting consumption units when needed.
Fuel economy supports both distance-per-volume and volume-per-distance units.
Reserved above the conversion cards and below the converter.
About Converting Miles per imperial gallon to Liters per 100 kilometers
Miles per imperial gallon and Liters per 100 kilometers are two of the ways the world measures fuel efficiency, and converting between them is essential for comparing a US car's window-sticker rating to a European or Asian one. Miles per imperial gallon is typically associated with united Kingdom (historically; UK now also uses L/100km), while Liters per 100 kilometers is typically associated with standard fuel-economy unit across most of Europe, Canada, Australia, and elsewhere.
Formula
Fuel economy formulas invert between distance-per-volume and volume-per-distance units as needed.
Efficiency-style units (like mpg or km/L) and consumption-style units (like L/100 km) measure the same underlying thing from opposite directions, so converting between the two families requires a reciprocal, not just a multiplication factor.
Simple example
1 mpg imp × 3.540062e+13 = 282.4809363 L/100 km
1 miles per imperial gallon = 282.4809363 liters per 100 kilometers.
Real-world example
30 mpg imp × 3.540062e+13 = 9.416031211 L/100 km
30 miles per imperial gallon = 9.416031211 liters per 100 kilometers.
Conversion table
| Miles per imperial gallon (mpg imp) | Liters per 100 kilometers (L/100 km) |
|---|---|
| 10 mpg imp | 28.24809363 L/100 km |
| 20 mpg imp | 14.12404682 L/100 km |
| 30 mpg imp | 9.416031211 L/100 km |
| 40 mpg imp | 7.062023408 L/100 km |
| 50 mpg imp | 5.649618727 L/100 km |
| 60 mpg imp | 4.708015606 L/100 km |
Reverse conversion: Liters per 100 kilometers to Miles per imperial gallon
282.4809363 L/100 km × 2.824809e-14 = 1 mpg imp
282.4809363 liters per 100 kilometers = 1 miles per imperial gallon.
Fuel economy formulas invert between distance-per-volume and volume-per-distance units as needed.
For a page dedicated to this direction, see Liters per 100 kilometers to Miles per imperial gallon.
Miles per imperial gallon vs. Liters per 100 kilometers
| Aspect | Miles per imperial gallon | Liters per 100 kilometers |
|---|---|---|
| Family | UK/imperial customary unit | Metric unit |
| Typical use | UK vehicle fuel-economy figures (particularly older or enthusiast/import contexts) | Official vehicle fuel-consumption labeling across most of the world outside the US |
| Where it's used | United Kingdom (historically; UK now also uses L/100km) | Standard fuel-economy unit across most of Europe, Canada, Australia, and elsewhere |
Understanding the Miles per imperial gallon
Miles per imperial gallon (mpg imp) measures fuel economy. Miles per imperial gallon measures distance per imperial gallon (4.54609 L) — about 20% larger than the US gallon, so an imperial MPG figure is correspondingly higher for the same real efficiency. It is classified as a UK/imperial customary unit.
Where it's used: United Kingdom (historically; UK now also uses L/100km)
US mpg vs. imperial mpg. The identical term 'mpg' means a different amount depending on which gallon is used — an imperial mpg figure is about 20% higher than the equivalent US mpg for the same actual fuel efficiency, a common source of confusion when comparing US and UK/Canadian car specs.
Uses of the Miles per imperial gallon today
- UK vehicle fuel-economy figures (particularly older or enthusiast/import contexts)
- Comparing UK-market vehicle specifications to US ones
History of the Miles per imperial gallon
Imperial MPG follows the same automotive tradition as US MPG but uses Britain's imperial gallon (standardized in 1824), leading to the two systems diverging even though they share identical terminology.
Historical origin. Miles per imperial gallon was not the invention of a single named person; it developed through the process described above.
Understanding the Liters per 100 kilometers
Liters per 100 kilometers (L/100 km) measures fuel consumption. Liters per 100 kilometers measures fuel consumed to travel 100 km — lower values mean better efficiency, the reverse convention from mpg/km-per-L. It is classified as a Metric unit.
Where it's used: Standard fuel-economy unit across most of Europe, Canada, Australia, and elsewhere
Uses of the Liters per 100 kilometers today
- Official vehicle fuel-consumption labeling across most of the world outside the US
- European and Canadian vehicle efficiency standards and taxation
History of the Liters per 100 kilometers
L/100km inverts the 'efficiency' framing of mpg/km-per-L into a 'consumption' framing (how much fuel is used for a fixed distance), which many transport agencies consider more intuitive for comparing costs and emissions — it became the standard EU fuel-labeling metric as part of vehicle emissions and efficiency regulations from the late 20th century onward.
Historical origin. Liters per 100 kilometers was not the invention of a single named person; it developed through the process described above.
Miles per imperial gallon — sources
- UK Department for Transport — Vehicle fuel economy — Historical basis for UK mpg reporting.
Liters per 100 kilometers — sources
- European Commission — Fuel Economy Labelling Directive — Basis for L/100km as the standard EU fuel-consumption metric.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many liters per 100 kilometers are in 1 miles per imperial gallon?
1 miles per imperial gallon equals 282.4809363 liters per 100 kilometers, using the exact defined conversion factor rather than an estimate.
How do I convert miles per imperial gallon to liters per 100 kilometers?
Fuel economy units sometimes need inversion rather than simple multiplication — the converter above and the formula section handle this automatically.
How do I convert liters per 100 kilometers back to miles per imperial gallon?
Use the reverse factor: 1 liters per 100 kilometers equals 282.4809363 miles per imperial gallon. You can also use the swap control in the converter above to flip the direction instantly.
What is a miles per imperial gallon?
Miles per imperial gallon (mpg imp) measures fuel economy. Miles per imperial gallon measures distance per imperial gallon (4.54609 L) — about 20% larger than the US gallon, so an imperial MPG figure is correspondingly higher for the same real efficiency. It is classified as a UK/imperial customary unit.
What is a liters per 100 kilometers?
Liters per 100 kilometers (L/100 km) measures fuel consumption. Liters per 100 kilometers measures fuel consumed to travel 100 km — lower values mean better efficiency, the reverse convention from mpg/km-per-L. It is classified as a Metric unit.
Is the miles per imperial gallon to liters per 100 kilometers conversion exact?
Yes. Both miles per imperial gallon and liters per 100 kilometers are defined by fixed standards rather than physical artifacts, so the factor of 3.540062e+13 used above is exact to as many digits as you choose to display.
What is the difference between us mpg vs. imperial mpg?
The identical term 'mpg' means a different amount depending on which gallon is used — an imperial mpg figure is about 20% higher than the equivalent US mpg for the same actual fuel efficiency, a common source of confusion when comparing US and UK/Canadian car specs.
Where is the miles per imperial gallon still used today?
United Kingdom (historically; UK now also uses L/100km)