Fuel Consumption
Estimate Fuel Consumption by entering distance, fuel efficiency, and price per litre or gallon. See total fuel cost and CO₂ emissions for any journey.
Formula
235.215 / MPG (US) = L/100km
Inverse relationship: As MPG goes up, L/100km goes down. The constant 235.215 accounts for gallon-liter and mile-km conversions.
Frequently Asked Questions
What is a good fuel economy score?
Generally, >30 MPG (US) or <8 L/100km is considered good for a non-hybrid sedan. Hybrids often exceed 50 MPG (<4.7 L/100km).
Does driving speed affect fuel consumption?
Yes drastically. Aerodynamic drag increases with the square of speed. Driving at 80mph can consume 25% more fuel than driving at 65mph.
How to calculate fuel cost per mile?
Divide the price of fuel per gallon by your MPG. Example: $3.50/gal ÷ 25 MPG = $0.14 per mile.
How to improve fuel efficiency?
Check tire pressure, remove excess weight, avoid rapid acceleration, use cruise control on highways, and perform regular maintenance (air filters, oil).