Gas Trip Cost Calculator

Divide the trip distance by your vehicle's MPG to get gallons needed. Then multiply gallons by the gas price per gallon. Formula: (Distance / MPG) × Gas Price = Total Fuel Cost.

At 30 MPG, a 500-mile trip needs about 16.7 gallons (500 ÷ 30). At 25 MPG, you'd need 20 gallons. Your actual usage depends on your vehicle's fuel efficiency.

The average fuel economy for new cars and light trucks in the US is approximately 28–32 MPG. Larger trucks and SUVs typically get 18–24 MPG, while hybrids can achieve 45–55 MPG.

Yes! Toggle the Round Trip option to automatically double the distance and calculate the total fuel cost for the entire journey there and back.

The US national average gas price is tracked by the EIA (Energy Information Administration) at eia.gov. Apps like GasBuddy also show local gas prices near you.