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MPGe Converter

Convert between the EPA's MPGe metric and actual energy consumption.

What this calculator does

Convert between MPGe and kWh per 100 miles using the EPA energy equivalence of 33.7 kWh per gallon of gasoline. The tool also shows kWh per mile so you can use the result for cost or range planning.

Inputs explained

How it works / Method

  1. Use the EPA energy equivalence of 33.7 kWh per gallon.
  2. Convert MPGe to kWh/100mi or invert the formula to get MPGe.
  3. Calculate kWh per mile for quick cost math.

Formula(s) used

MPGe = (33.7 * 100) / (kWh/100mi)

kWh/100mi = (33.7 * 100) / MPGe

kWh/mi = (kWh/100mi) / 100

Units: MPGe is miles per gallon equivalent, kWh/100mi is energy per 100 miles.

Input

Results

MPGe -
Approx kWh/100mi -
kWh per mile -

Step-by-step example

Example input: 120 MPGe.

Use cases

Assumptions & limitations

Disclaimer: Results are estimates for planning only. Real world energy use varies by conditions and driving style.

Frequently Asked Questions

MPGe stands for miles per gallon equivalent. It compares the distance an EV can travel on the same energy as one gallon of gasoline. The EPA sets that energy equivalence at 33.7 kWh. MPGe is useful for comparing EV efficiency to gasoline vehicles, but it is still a standardized test rating that can differ from your real driving results.
kWh/100mi is energy per distance, which is easy to multiply by your electricity rate for cost. Many trip planners and energy models use kWh per distance instead of MPGe. Converting helps you translate an EPA label into a number that is more practical for budgeting and planning charging. The math is direct, using the 33.7 kWh equivalence.
MPGe is a standardized EPA rating based on test procedures and energy equivalence. It is useful for comparisons, but it does not represent every charging loss or accessory load you may see at home. Your actual kWh from the wall can be higher than the battery energy shown by the vehicle. Use the charging cost calculator to add charging losses for a more realistic cost estimate.
Yes. First convert MPGe to kWh/100mi with this tool, then use the efficiency converter to switch to kWh/100km. This two step approach keeps the math clear and avoids unit confusion. It is also helpful if you are comparing U.S. labels to metric units used in other regions.
Convert MPGe to kWh/100mi, then multiply by your electricity price per kWh. That gives energy cost per 100 miles. You can divide by 100 to get kWh per mile and multiply by trip distance for total energy. Add charging losses or public pricing differences with the charging cost and session pricing tools to get a more complete estimate.
MPGe is derived from standardized tests, while your dashboard reflects real world driving. Speed, temperature, terrain, and accessory use can shift efficiency significantly. Your car may also report battery energy rather than wall energy. Use this converter to interpret the label values, then compare them with your own driving data for a more realistic picture.

Sources & references

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