Convert Miles per US Gallon to Liters per Nautical Mile
Convert Miles per US Gallon (mpg (US)) to Liters per Nautical Mile (L/nmi) instantly and accurately.
Conversion Formula
L/nmi = 4.356174083 ÷ 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 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.
Quick Reference Table
| Miles per US Gallon (mpg (US)) | Liters per Nautical Mile (L/nmi) |
|---|---|
| 1 mpg (US) | 4.35617 L/nmi |
| 2 mpg (US) | 2.17809 L/nmi |
| 5 mpg (US) | 0.871235 L/nmi |
| 10 mpg (US) | 0.435617 L/nmi |
| 25 mpg (US) | 0.174247 L/nmi |
| 50 mpg (US) | 0.0871235 L/nmi |
| 100 mpg (US) | 0.0435617 L/nmi |