MPG Calculator — Miles Per Gallon
Quick answer: Enter miles driven and gallons used to calculate MPG and fuel efficiency in all units.
Calculate your vehicle's fuel efficiency in miles per gallon (MPG), liters per 100km, and km per liter. Optionally calculate your trip cost when you enter the gas price.
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Last reviewed: April 2026Report an error
MPG
30.00 mpg
Fuel economy: 30.00 mpg (7.84 L/100km).
MPG
30.00
L/100km
7.84
km/L
12.75
Cost per Mile
$0.117
Trip Cost
$35.00
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How to Use This MPG Calculator
- 1Enter the miles driven (or km).
- 2Enter gallons of fuel used.
- 3Optionally enter current gas price per gallon.
- 4Read MPG, L/100km, and estimated fuel cost.
Frequently Asked Questions
- For gas-powered cars: 30+ MPG is excellent, 25–30 is good, 20–25 is average. SUVs and trucks average 15–22 MPG. Hybrids typically achieve 40–60 MPG. EVs are rated in MPGe (miles per gallon equivalent).
- Fill your tank completely. Drive until you need fuel. Fill again and note gallons used. Read your odometer difference. MPG = miles driven ÷ gallons used.
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