Convert MPG (US) (mpg_us) to km/L (kml) instantly. US fuel economy to metric conversion.
| Unit | Name | Value |
|---|---|---|
| kml | km/L (kmpl) | — |
| l100km | L/100km | — |
| mpg_uk | MPG (UK) | — |
| mpl | Miles per Litre | — |
Formula: km/L = MPG (US) × 0.4251
Reverse: Reverse: MPG (US) = km/L × 2.352
Example (average car): 29.4 MPG (US) = 12.5 km/L
Typical real-world fuel economy values — sorted from least to most efficient
| MPG (US) (MPG (US)) | km/L (km/L) | Vehicle / Context |
|---|---|---|
| 8.233 MPG (US) | 3.5 km/L | Diesel semi-truck (full load) |
| 10.58 MPG (US) | 4.5 km/L | Hypercar (McLaren F1) |
| 17.64 MPG (US) | 7.5 km/L | Large pickup truck |
| 19.99 MPG (US) | 8.5 km/L | Large SUV |
| 29.4 MPG (US) | 12.5 km/L | Average new petrol car (global) |
| 32.93 MPG (US) | 14 km/L | Compact sedan |
| 39.99 MPG (US) | 17 km/L | European supermini |
| 42.34 MPG (US) | 18 km/L | Motorcycle (1000cc) |
| 51.75 MPG (US) | 22 km/L | Honda Insight hybrid |
| 58.8 MPG (US) | 25 km/L | Toyota Prius hybrid |
| 65.86 MPG (US) | 28 km/L | Toyota Prius Prime PHEV |
| 70.56 MPG (US) | 30 km/L | Suzuki Alto (city car) |
| 82.33 MPG (US) | 35 km/L | Motorcycle (125cc) |
| 117.6 MPG (US) | 50 km/L | Scooter (50cc) |
| 261.1 MPG (US) | 111 km/L | Volkswagen XL1 (record) |
MPG (US) × 0.4251 = km/L.
30 MPG US = 12.75 km/L. 40 MPG US = 17.0 km/L. 50 MPG US = 21.3 km/L.
km/L × 2.352 = MPG (US).
Compares fuel economy across international vehicle specs — converting between MPG (US), MPG (UK), km/L, and L/100km.
Calculates fuel costs and sets efficiency targets using L/100km (Europe/Australia) or MPG (US/UK).
Converts between regional fuel economy standards when reviewing international vehicle launches.
Converts fuel economy specs of rental vehicles between familiar and local units.
Converts fuel efficiency data to calculate CO₂ emissions across vehicle fleets in different units.
Validates fuel efficiency test results across EPA (MPG US), WLTP (L/100km), and JC08 (km/L) cycles.
Miles per gallon — US (MPG US) uses the US gallon of 3.785 liters. It is the mandatory fuel economy rating in the United States and is published by the EPA for all new vehicles sold in the US. The US gallon is about 17% smaller than the Imperial gallon.
EPA fuel economy ratings: combined city/highway. A typical American sedan achieves 28–35 MPG; a large pickup truck 16–22 MPG; Toyota Prius hybrid 50–57 MPG; the Tesla Model 3 is rated at 132 MPGe (miles per gallon equivalent). The CAFE standard requires ~49 MPG fleet average by 2026.
Interesting fact: The US MPG standard was introduced in response to the 1973 Arab oil embargo. The EPA fuel economy label on new vehicles has been redesigned multiple times, most recently in 2013, and now also shows MPGe (miles per gallon equivalent) for electric and plug-in hybrid vehicles.
Kilometers per liter (km/L) is the fuel efficiency unit standard in Japan, South Korea, India, and many other Asian and Latin American countries. A higher km/L value means better fuel economy — the vehicle travels further on the same amount of fuel.
Japanese automakers publish km/L ratings from the JC08 or WLTC test cycles. A fuel-efficient city car in Japan might achieve 25–35 km/L; a typical sedan 15–20 km/L; a large SUV 8–12 km/L. The 2024 Toyota Prius achieves ~32 km/L under JC08 testing.
Interesting fact: The world record for fuel efficiency in a production vehicle is held by the Volkswagen XL1 (2013), which achieved approximately 111 km/L (261 mpg US) under NEDC testing — a two-seater diesel-electric hybrid that weighed only 795 kg.
Fuel efficiency is measured differently across regions: km/L (Japan, India), L/100km (Europe, Australia, Canada), MPG US (USA), MPG UK (Britain). Converting between them is essential for international vehicle comparisons.
Formula: km/L = MPG (US) × 0.4251. Reverse: MPG (US) = km/L × 2.352.
All conversions use exact gallon definitions: US gallon = 3.785411784 L; Imperial gallon = 4.54609 L.