Convert Miles per Imperial Gallon to Nautical Miles per Liter
Convert Miles per Imperial Gallon (mpg (Imp)) to Nautical Miles per Liter (nmi/L) instantly and accurately.
Conversion Formula
nmi/L = mpg (Imp) × 5.231546941
About Miles per Imperial Gallon
Miles per Imperial gallon (mpg(Imp)) is the UK and historically Commonwealth standard. The Imperial gallon (4.54609 L) is ~20.1% larger than the US gallon, so mpg(Imp) is always numerically higher: a 7 L/100km car achieves 33.6 mpg(US) but 40.4 mpg(Imp). All UK VCA-certified specs list mpg(Imp). Typical WLTP combined: supermini 45-60 mpg; full hybrid 55-75 mpg; diesel family car 48-68 mpg; large petrol SUV 28-38 mpg. 1 mpg(Imp) = 1.609344/4.54609 km/L = 0.354006 km/L; L/100km = 282.481/mpg(Imp).
About Nautical Miles per Liter
Nautical miles per liter (nmi/L) quantifies how far a vessel travels on one liter of fuel. 1 nmi/L = 1.852 km/L. Typical values: sailing yacht under auxiliary diesel ~0.2-0.5 nmi/L; fast 35-knot catamaran ferry ~0.003-0.008 nmi/L; outboard RIB at planning speed ~0.01-0.04 nmi/L. A sportsboat with a 200 L tank at 0.08 nmi/L has ~16 nmi theoretical range, reduced by 30-40% safety margin. Maritime energy efficiency programs under MARPOL Annex VI reference nmi/L before normalising for cargo capacity. 1 nmi/L = 1.852 km/L.
Quick Reference Table
| Miles per Imperial Gallon (mpg (Imp)) | Nautical Miles per Liter (nmi/L) |
|---|---|
| 1 mpg (Imp) | 0.191148 nmi/L |
| 2 mpg (Imp) | 0.382296 nmi/L |
| 5 mpg (Imp) | 0.95574 nmi/L |
| 10 mpg (Imp) | 1.91148 nmi/L |
| 25 mpg (Imp) | 4.7787 nmi/L |
| 50 mpg (Imp) | 9.5574 nmi/L |
| 100 mpg (Imp) | 19.1148 nmi/L |