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Fuel Cost Calculator

A 300-mile trip at 28 MPG and $3.50 a gallon costs about $38 in gas, or $0.125 per mile; at 12,000 miles a year that is roughly $1,500 in annual fuel cost. Enter your own trip and MPG below.

Details

Trip distance (miles)

Fuel efficiency (MPG)

Gas price ($/gallon)

Annual miles (optional)

Results

Trip fuel cost -

Gallons used -

Cost per mile -

Annual fuel cost -

Estimates only. Confirm exact terms with your lender or dealer.

By Jessica Martinez, Contributing Writer, Business & Finance · Updated 2026-07-02

How much does a road trip cost in gas?

Gallons used = distance ÷ MPG, and fuel cost = gallons × price per gallon. We also show your cost per mile and project annual fuel spending from your yearly mileage.

MPG matters: improving from 25 to 35 MPG can cut your fuel bill by nearly a third.

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Good to know

FAQs

How do I calculate fuel cost?

Divide distance by MPG for gallons, then multiply by the price per gallon.

What is cost per mile?

Gas price divided by MPG - a quick way to compare vehicles.

How can I save on fuel?

Drive smoothly, keep tires inflated, reduce weight, and choose a higher-MPG vehicle.

Does this include EVs?

It’s built for gas vehicles; EV cost depends on electricity rates and efficiency.

Is the annual figure accurate?

It’s an estimate based on your average MPG and mileage.