Fuel Efficiency Converter
Convert between different units of fuel efficiency measurement including miles per gallon (MPG), liters per 100 kilometers (L/100km), kilometers per liter, and more. Essential for automotive and transportation calculations.
Common Fuel Efficiency Conversions
⛽ Fuel Efficiency vs Consumption
Efficiency Units: Distance per fuel volume (mpg, km/L) - higher is better
Consumption Units: Fuel volume per distance (L/100km, gal/100mi) - lower is better
Relationship: Efficiency = 1/Consumption (with unit conversion)
US Standard: Miles per gallon (mpg) - efficiency format
Metric Standard: Liters per 100 kilometers (L/100km) - consumption format
🚗 Factors Affecting Fuel Efficiency
Driving Habits: Aggressive acceleration/braking reduces efficiency by 15-30%
Speed: Efficiency peaks around 45-55 mph, drops significantly above 70 mph
Vehicle Maintenance: Proper tire pressure, clean air filter, regular tune-ups
Load: Extra 100 lbs reduces efficiency by 1-2%
Weather: Cold weather, A/C use, headwinds affect consumption
🌍 Global Standards & Regulations
CAFE Standards (US): Corporate Average Fuel Economy requirements
EU Standards: CO₂ emissions limits (g/km) tied to fuel consumption
Testing Cycles: EPA (US), NEDC/WLTP (EU), JC08 (Japan)
Real-world vs Lab: Actual efficiency often 15-25% lower than rated
🔋 Alternative Fuel Metrics
MPGe: Miles per gallon equivalent (electric vehicles)
kWh/100mi: Energy consumption for electric vehicles
kg H₂/100km: Hydrogen fuel cell consumption
GGE: Gasoline gallon equivalent for natural gas vehicles
Conversion: 1 gallon gasoline ≈ 33.7 kWh energy content
💰 Economic Impact
Fuel Cost Calculation: (Distance / Efficiency) × Fuel Price
Annual Savings: Improving from 20 to 30 mpg saves ~$800/year (15k mi)
Vehicle Selection: Higher efficiency often justifies higher purchase price
Fleet Management: Efficiency improvements reduce operating costs
🌱 Environmental Impact
CO₂ Emissions: ~19.6 lbs CO₂ per gallon of gasoline burned
Efficiency Doubling: Cuts fuel consumption and emissions in half
Lifecycle Analysis: Consider vehicle production, fuel extraction, disposal
Alternative Fuels: Biodiesel, ethanol, hydrogen have different carbon footprints
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