MPG Calculator: Miles Per Gallon
Calculate your vehicle's fuel economy by entering the miles driven and gallons used. Track your MPG over time to spot changes in fuel efficiency and identify maintenance needs.
Enter Trip Data
Fuel Economy
Formula
MPG = Miles Driven ÷ Gallons Used
Example: 350 miles ÷ 14 gallons = 25 MPG
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Frequently Asked Questions
How do I track my MPG?
Fill your tank completely, reset your trip odometer, drive normally until you refuel, fill up again and note the gallons. Divide trip miles by gallons used.
What is a good MPG?
For passenger cars, 25-35 MPG is average. 35+ is good, 40+ is excellent. Hybrids routinely achieve 45-60 MPG. SUVs average 20-28 MPG.
Why is my MPG lower in winter?
Cold weather reduces MPG by 10-20% due to denser air, winter fuel blends, longer warm-up times, and increased use of defoggers and heated seats.
Does city or highway get better MPG?
Highway driving is typically 20-30% more efficient than city driving due to fewer stops, steadier speeds, and less idling.
How does speed affect MPG?
Fuel efficiency drops above 50 mph. Each 5 mph over 50 is like paying an additional $0.25-0.50 per gallon. The sweet spot is typically 45-65 mph.