Convert Miles per US Gallon to US Gallons per 100 Miles
Convert Miles per US Gallon (mpg (US)) to US Gallons per 100 Miles (US gal/100mi) instantly and accurately.
Conversion Formula
US gal/100mi = 100 ÷ mpg (US)
About Miles per US Gallon
Miles per US gallon (mpg(US)) is the US and Canadian standard, displayed on every EPA Monroney sticker and used in CAFE regulations. The US gallon = 3.785411784 L; 1 mile = 1.609344 km. 2026 CAFE passenger car standard: ~49 mpg. Toyota Prius Prime: 52 mpg; Tesla Model 3: 132 MPGe. Historical: Ford Model T 21-25 mpg; 1973 US full-size cars 10-15 mpg. NASCAR at race speed: 4-5 mpg; Class 8 semi: 5-8 mpg. L/100km = 235.21458/mpg(US): 30 mpg = 7.84 L/100km; 50 mpg = 4.71 L/100km.
About US Gallons per 100 Miles
US gallons per 100 miles is the volumetric consumption figure displayed alongside mpg on the EPA Monroney fuel-economy label on all new US vehicles since 2013. A smaller number means a more efficient car. At $4/gal, gal/100mi × 4 gives the dollar fuel cost per 100 miles. Ranges: 1.5-2 gal/100mi for efficient compacts (50-67 mpg); 2.5-3.5 for mainstream sedans (28-40 mpg); 4-6 for crossovers/light trucks (17-25 mpg). 1 US gal/100mi = 3.785411784/1.609344 = 2.3521 L/100km.
Quick Reference Table
| Miles per US Gallon (mpg (US)) | US Gallons per 100 Miles (US gal/100mi) |
|---|---|
| 1 mpg (US) | 100 US gal/100mi |
| 2 mpg (US) | 50 US gal/100mi |
| 5 mpg (US) | 20 US gal/100mi |
| 10 mpg (US) | 10 US gal/100mi |
| 25 mpg (US) | 4 US gal/100mi |
| 50 mpg (US) | 2 US gal/100mi |
| 100 mpg (US) | 1 US gal/100mi |