18 MPG Calculator

The 18 miles per gallon calculator shows the running cost of a vehicle that returns 18 MPG. That figure is common for full-size pickups, midsize SUVs, loaded minivans, and older V8 sedans. With the MPG locked at 18, you only need a trip distance and a gas price to see what your driving costs.

Enter the miles you plan to drive and the price per gallon, and the calculator returns total fuel cost, gallons needed, cost per mile, and an annual estimate. At 18 MPG you sit below the US average of roughly 26–28 MPG, so the per-mile cost is noticeably higher than for a modern compact — useful to know when weighing a thirstier vehicle against a more efficient one.

Below the calculator is a list of vehicles that typically average 18 MPG, plus a cost table across common distances and gas prices. Compare with our 13 MPG and 25 MPG calculators, and use the MPG Cost tool for fully custom inputs.

• Midsize SUVs in city driving (Ford Explorer, Jeep Grand Cherokee)
• Full-size pickup trucks (Ford F-150 V8)
• Minivans under heavy load
• Older midsize sedans

1. The MPG is fixed at 18 for this calculator.
2. Enter the miles to drive.
3. Enter the gas price per gallon.
4. Click Calculate Fuel Cost (or press Enter).
5. Review total cost, gallons needed, cost per mile, and annual cost.

Related tools: MPG Calculator, 13 MPG Calculator, 25 MPG Calculator, MPG Cost Calculator.