Fuel Efficiency (Mass) Converter

Convert mass-based fuel consumption and emissions rates between metric and imperial units. Useful for vehicle CO₂ emissions reporting (g/km is the EU standard), automotive emissions testing, heavy truck fuel monitoring, and aviation fuel consumption by mass. Metric units include kg/100km, g/km, mg/km, kg/km, and g/mi. Imperial units include lb/100mi, lb/mi, oz/100mi, oz/mi, and kg/mi. All conversions use exact factors: 1 mile = 1.60934 km, 1 lb = 0.453592 kg. Includes a real-world reference table with Euro 6 CO₂ targets, typical petrol car emissions (g CO₂/km), diesel articulated truck consumption, and small motorbike examples. All browser-based.