Convert Liters per Nautical Mile to Miles per US Gallon
Convert Liters per Nautical Mile (L/nmi) to Miles per US Gallon (mpg (US)) instantly and accurately.
Conversion Formula
mpg (US) = 4.356174083 ÷ L/nmi
About Liters per Nautical Mile
Liters per nautical mile (L/nmi) is the maritime fuel consumption unit. One nautical mile = 1.852 km exactly (one arcminute of latitude). A large container ship (400 m, 200,000 DWT) at 18 knots consumes 50,000-100,000 L/nmi of heavy fuel oil; a RoPax ferry 800-3,000 L/nmi; a RIB patrol boat at 25 knots 30-80 L/nmi. Slow-steaming reduces L/nmi by 30-40% due to the cubic drag-speed relationship. Bunker cost per nmi = L/nmi × fuel price/litre. 1 L/nmi = 100/1.852 ≈ 53.996 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
| Liters per Nautical Mile (L/nmi) | Miles per US Gallon (mpg (US)) |
|---|---|
| 1 L/nmi | 4.35617 mpg (US) |
| 2 L/nmi | 2.17809 mpg (US) |
| 5 L/nmi | 0.871235 mpg (US) |
| 10 L/nmi | 0.435617 mpg (US) |
| 25 L/nmi | 0.174247 mpg (US) |
| 50 L/nmi | 0.0871235 mpg (US) |
| 100 L/nmi | 0.0435617 mpg (US) |