Vehicles & TravelFormula-based · Runs in your browser

Gas Mileage Calculator

Convert a trip into MPG, liters per 100 km, and kilometers per liter.

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Inputs

Enter the values you know. Optional fields may be left empty.

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Result

Updates as valid inputs change.

Calculated locally
Miles per US gallon
Liters per 100 km
Kilometers per liter

Saved locally, explained clearly

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Calculation steps

Follow what happened from the selected formula to the displayed answer.

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  1. 1

    Formula selected

    The calculator uses the following formula or method.

    MPG = miles ÷ gallons; L/100 km = 235.214583 ÷ MPG

  2. 2

    Values entered

    Your values are placed into the calculation.

    Enter values to see what is used in this step.

  3. 3

    Result calculated

    The formula or method produces the following result values.

    Results will appear after a successful calculation.

  4. 4

    Answer formatted

    Displayed values are rounded and formatted using each output’s configured precision.

Scenario comparison

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Recent calculations

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Data and privacy

How it works

Enter one trip using either US or metric fuel units. The calculator converts the result into all three common efficiency formats.

Input query strings and outputs

Use an input name in this page’s URL as ?name=value, and join additional inputs with &. Portable shared links may instead use the compact ?ac= state parameter.

Input query strings

3
  • ?inputSystem= Input units

    Choice · Required · Default: us · Accepted values: us, metric

  • ?distance= Distance traveled

    Number · Required · Default: 360

  • ?fuelUsed= Fuel used

    Number · Required · Default: 12

Outputs

3
  • mpg Miles per US gallon

    Number · Primary output

  • litersPer100Km Liters per 100 km

    Number

  • kmPerLiter Kilometers per liter

    Number

Sources
  • No external reference is listed for this calculator. Its formula and variable definitions are shown above.
Limitations
  • Real costs and performance can differ with road conditions, usage, local prices, and vehicle specifications.