Gas Mileage Calculator

Calculate your real-world fuel efficiency (MPG) from actual fill-up data. Shows cost per mile and per 100 miles.

Distance Driven (miles)

Gallons Used

Price per Gallon ($)

Fuel Efficiency

25.0 MPG

Cost per Mile$0

Cost per 100 Miles$0

📐 Formula

MPG = Miles Driven ÷ Gallons Used. Cost per Mile = (Gallons × Price) ÷ Miles

Frequently Asked Questions

Fill up your tank completely and reset your trip odometer. Drive normally until you fill up again. Divide the miles driven by the gallons it took to refill. That's your real-world MPG.

For 2024: compact sedans 30–40 MPG, SUVs 22–28 MPG, trucks 18–25 MPG, hybrids 40–55 MPG. The EPA rates vehicles under controlled conditions; real-world MPG is typically 15–20% lower.

MPG varies with speed (highway vs city), temperature (cold engines use more fuel), load (extra passengers or cargo), driving style, AC use, and tire inflation.