How do I calculate fuel cost for a trip?

Divide distance by fuel efficiency to get gallons used, then multiply by price per gallon. Cost = (distance / MPG) × price per gallon.

How much CO₂ does driving produce?

Burning one gallon of gasoline produces approximately 8.887 kg of CO₂. Diesel produces about 10.15 kg per gallon.

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Fuel Cost Calculator

Estimate fuel cost, gallons or liters used, CO₂ emissions, and cost per mile or km for any road trip.

Calculate

Unit System

Distance (miles)

Fuel Efficiency (MPG)

Fuel Price ($/gallon)

About the Fuel Cost Calculator

Planning a road trip? This calculator helps you estimate the total fuel cost, fuel consumption, and CO₂ emissions for any journey. In imperial mode, the calculation is: gallons = distance / MPG; cost = gallons × price per gallon. In metric mode: liters = (distance / 100) × L per 100km; cost = liters × price per liter. To find your car's actual fuel efficiency from a recent fill-up, use our Gas Mileage Calculator.

CO₂ emissions are estimated using the EPA standard of 8.887 kg CO₂ per gallon of gasoline (2.31 kg per liter). Understanding your vehicle's true fuel economy can significantly impact your trip budget. For time-based planning of your journey, also check our Speed Calculator to estimate travel time based on distance and average speed.

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For a related calculation, use Gas Mileage Calculator to calculate MPG and L/100km from miles driven and gallons used. Estimate range and cost per mile. Alternatively, use Dew Point Calculator to calculate dew point from temperature and relative humidity. Includes comfort level interpretation.