Gas Mileage Calculator
Calculate miles per gallon, L/100km, cost per mile, cost per kilometre and total trip fuel cost.
Hit Calculate to see your result
Cost appears after calculation
Metrics appear after calculation
Your explanation appears here
For best accuracy, fill the tank, reset the trip meter, drive normally, then record gallons or litres needed at the next refill.
Your plan appears after calculation
Test lower fuel use or a different gas price without changing your main result.
Calculate your baseline first
The calculator converts distance and gas units, then calculates MPG, L/100km, cost per mile, cost per kilometre and total trip cost.
MPG increases as efficiency improves, while L/100km decreases as efficiency improves. They describe the same trip from opposite directions.
Trip cost is gas used multiplied by the price you enter. Cost per mile divides that trip cost by miles driven; cost per kilometre uses the converted kilometre distance.
Results are estimates generated locally in your browser from the gas used, distance and price values you enter. They are for informational purposes only and may differ from onboard computer readings, official ratings or real-world costs. Fuel price, fuel type, traffic, tyre pressure, load, terrain and driving style can materially change results. VisionVix accepts no liability for decisions based on this output.
