Convert US Gallons per 100 Miles to Miles per US Gallon
Convert US Gallons per 100 Miles (US gal/100mi) to Miles per US Gallon (mpg (US)) instantly and accurately.
Conversion Formula
mpg (US) = 100 ÷ US gal/100mi
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.
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.
Quick Reference Table
| US Gallons per 100 Miles (US gal/100mi) | Miles per US Gallon (mpg (US)) |
|---|---|
| 1 US gal/100mi | 100 mpg (US) |
| 2 US gal/100mi | 50 mpg (US) |
| 5 US gal/100mi | 20 mpg (US) |
| 10 US gal/100mi | 10 mpg (US) |
| 25 US gal/100mi | 4 mpg (US) |
| 50 US gal/100mi | 2 mpg (US) |
| 100 US gal/100mi | 1 mpg (US) |