Gas Mileage Calculator

Calculate your vehicle's gas mileage (MPG), fuel efficiency (L/100km), and fuel costs. Track and improve your fuel economy.

Amount of fuel to refill tank

Current price at the pump

MPG = Distance (miles) ÷ Fuel Used (gallons)\nL/100km = 235.21 ÷ MPG\nCost Per Mile = Fuel Price ÷ MPG\nTotal Cost = Fuel Used × Price Per Gallon
Example 1:\nDistance: 300 miles\nFuel Used: 10 gallons\n\nMPG = 300 ÷ 10 = 30 MPG\nL/100km = 235.21 ÷ 30 = 7.84 L/100km\n\nExample 2 (with cost):\nDistance: 400 miles\nFuel: 15 gallons at $3.50/gal\n\nMPG = 26.67\nTotal Cost = 15 × $3.50 = $52.50\nCost/Mile = $3.50 ÷ 26.67 = $0.131/mile

How do I calculate my gas mileage (MPG)?

Fill your tank completely, record the odometer reading. Drive normally until you need to refuel. Fill up again and note gallons added and new odometer reading. MPG = Miles Driven ÷ Gallons Used. For example: 300 miles ÷ 10 gallons = 30 MPG.

What is the difference between MPG and L/100km?

MPG (Miles Per Gallon) is used in the US - higher is better. L/100km (Liters per 100 kilometers) is used internationally - lower is better. To convert: MPG to L/100km ≈ 235.21 ÷ MPG. For example, 30 MPG ≈ 7.84 L/100km.

What is considered good gas mileage?

Compact cars: 30-40 MPG (good). Sedans: 25-35 MPG. SUVs: 20-30 MPG. Trucks: 15-25 MPG. Hybrids: 40-60 MPG. Electric vehicles measure in MPGe (miles per gallon equivalent). Anything above these ranges is excellent.

How can I improve my gas mileage?

Tips: Maintain steady speeds (use cruise control), avoid rapid acceleration/braking, keep tires properly inflated, remove excess weight, combine trips, regular maintenance (air filter, oil changes), reduce AC use, and avoid idling.

Why does my gas mileage vary?

Factors affecting MPG: driving conditions (highway vs city), weather (cold reduces efficiency), cargo weight, tire pressure, driving habits, vehicle maintenance, fuel quality, terrain (hills reduce MPG), and AC/heater use.