Source unit
Mile per Imperial Gallon mpg (Imp)
Mile per Imperial Gallon is a unit used to measure fuel economy.
One mile per imperial gallon approximately equals 0.35400618993464713633 kilometers per liter.
Mile per Imperial Gallon to Liter per 100 Kilometers Converter
Reverse conversion: Liter per 100 Kilometers to Mile per Imperial GallonResult
Mile per Imperial Gallon to Liter per 100 Kilometers
Exact1 mpg (Imp)≈282.481 L/100 km
How to convert miles per imperial gallon to liters per 100 kilometers
Conversion table
Practical and common reference values
| Miles per imperial gallon (mpg (Imp)) | Liters per 100 kilometers (L/100 km) | Copy converted value |
|---|---|---|
| 10 | ≈ 28.24809363 | |
| 20 | ≈ 14.12404682 | |
| 30 | ≈ 9.416031211 | |
| 40 | ≈ 7.062023408 | |
| 50 | ≈ 5.649618727 | |
| 60 | ≈ 4.708015606 | |
| 70 | ≈ 4.035441948 | |
| 80 | ≈ 3.531011704 | |
| 100 | ≈ 2.824809363 |
About Miles per imperial gallon and Liters per 100 kilometers
Imperial MPG reports distance per imperial gallon; L/100 km reports fuel volume consumed over 100 kilometers. Higher MPG converts to lower consumption.
Mile per Imperial Gallon as the source, Liter per 100 Kilometers as the result
Use this direction when a UK or historical imperial-MPG rating must be entered into a metric comparison, fuel budget, fleet record, or vehicle specification using L/100 km.
Result unit
Liter per 100 Kilometers L/100 km
Liter per 100 Kilometers is a unit used to measure fuel economy.
One liter per 100 kilometers equals 100 kilometers per liter.
Where imperial-MPG-to-L/100-km conversion is useful
This direction supports imported vehicle comparisons, trip and fuel planning, historical UK specifications, fleet reporting, and metric consumption records when the original rating uses imperial MPG.
Higher mileage becomes lower consumption
The conversion is reciprocal: increasing imperial MPG reduces the L/100 km result. A simple fixed multiplier cannot represent the inverse relationship across different source values.
Verify the source gallon before entering MPG
Use this page only when MPG is based on the imperial gallon. A US-MPG source requires the separate US conversion; assuming the wrong gallon changes the metric consumption result.
How this conversion is verified
The exact imperial-gallon, statute-mile, liter, and kilometer definitions determine the reciprocal constant. The same converter calculation supplies the current result and practical table.
Standards used for this conversion
- UK Government: Weights and Measures Act 1985The imperial-gallon definition used by the source unit.
- NIST: Handbook 44, Appendix C: General Tables of UnitsThe volume and distance relationships connecting imperial MPG with metric consumption.
- NIST: Writing with SI (Metric System) UnitsRounding and numerical-presentation guidance.
Converting the unit does not make ratings from different test cycles directly comparable. Keep the original test standard and conditions with the converted number.
Because the relationship is reciprocal, doubling imperial MPG halves L/100 km; adding a fixed number of MPG does not subtract a fixed amount of consumption.
Frequently asked questions
6 answers for this conversion
- How do I convert imperial MPG to L/100 km?
- Divide the exact constant 56826125/201168, approximately 282.4809363, by the imperial-MPG value.
- Does higher imperial MPG mean lower L/100 km?
- Yes. More miles per imperial gallon means more distance from the same fuel volume and therefore less fuel consumed per 100 kilometers.
- What is 40 imperial MPG in L/100 km?
- Forty imperial MPG is approximately 7.062023408 L/100 km using the reviewed reciprocal relationship.
- How can I tell whether an MPG value is imperial?
- Check the source for labels such as imperial MPG, mpg-imp, or UK gallon. If it states US MPG or US gallon, use the US-MPG conversion instead.
- Why is zero imperial MPG undefined?
- The formula divides the reciprocal constant by MPG. Division by zero cannot produce a finite L/100 km value.
- Can converted ratings from different test cycles be compared directly?
- Not necessarily. Unit conversion preserves the stated efficiency but does not adjust for different laboratory procedures, vehicles, routes, or operating conditions.
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