--- title: "What kWh per 100 Miles Means (and How It Relates to MPGe)" description: "kWh per 100 miles is the EPA measure of how much electricity an EV uses. Lower is better. Learn how it relates to MPGe and your charging bill." url: https://evchargecosts.com/guides/what-kwh-per-100-miles-means/ updated: 2026-10-26 --- # What kWh per 100 Miles Means (and How It Relates to MPGe) kWh per 100 miles is how much electricity an EV draws from the wall to drive 100 miles, as measured in EPA tests. Lower is better: at 18.16¢/kWh, every extra 1 kWh/100 mi adds about $0.18 per 100 miles. By [EV Charge Cost Editorial Team](https://evchargecosts.com/about/). Published September 28, 2026, updated October 26, 2026. ## kWh/100 mi and MPGe MPGe (miles per gallon equivalent) treats 33.7 kWh as the energy in one gallon of gasoline. The conversion is MPGe = 3,370 ÷ kWh per 100 miles. A 33.5 kWh/100 mi EV is rated about 101 MPGe. ## Why kWh/100 mi is the better number for costs Your electricity bill is in kWh, so kWh/100 mi converts straight into dollars: multiply by your price. MPGe needs an extra conversion step and hides how small efficiency differences add up. ## Where to find it The EPA label on every new EV shows kWh/100 mi. We list it for every current model on the [vehicle pages](https://evchargecosts.com/vehicles/), taken from the fueleconomy.gov dataset. ## Why your real number can differ - Cold weather and cabin heating raise consumption. - Sustained highway speeds use more energy than the EPA combined cycle. - Larger wheels and roof loads increase drag and rolling resistance. ## From kWh/100 mi to dollars Multiply kWh per 100 miles by your price per kWh and you have the cost per 100 miles. The table converts a range of efficiencies at the U.S. average price of 18.16¢/kWh. **Efficiency, MPGe and cost at 18.16¢/kWh** | kWh/100 mi | MPGe | Miles per kWh | Per 100 miles | Per year | | --- | --- | --- | --- | --- | | 25 | 135 | 4.00 | $4.54 | $612.90 | | 28 | 120 | 3.57 | $5.08 | $686.45 | | 30 | 112 | 3.33 | $5.45 | $735.48 | | 33 | 102 | 3.03 | $5.99 | $809.03 | | 36 | 94 | 2.78 | $6.54 | $882.58 | | 40 | 84 | 2.50 | $7.26 | $980.64 | | 45 | 75 | 2.22 | $8.17 | $1,103.22 | | 50 | 67 | 2.00 | $9.08 | $1,225.80 | ## Efficiency across today's EVs In the current EPA data, representative trims range from 26.4 to 70.3 kWh per 100 miles. The typical EV used on this site, 33.5 kWh/100 mi, is the median of 26 popular models. Small sedans sit at the efficient end; large pickups and SUVs at the other. See [the cheapest EVs to charge](https://evchargecosts.com/guides/cheapest-evs-to-charge/) for the full ranking. ## Comparing two cars To compare two EVs, subtract their kWh/100 mi and multiply by your price and yearly miles ÷ 100. For example, a difference of 10 kWh/100 mi at 18.16¢/kWh and 13,500 miles a year is $245.16 a year. Related: [MPGe explained](https://evchargecosts.com/guides/mpge-explained/) and [converting kWh per mile and miles per kWh](https://evchargecosts.com/guides/kwh-per-mile-vs-miles-per-kwh/). ## Your own real-world figure You can measure your car's real consumption from the wall: note the kWh your charger or smart meter reports over a few weeks and divide by the miles driven in the same period, then multiply by 100. That number includes charging losses, so it is directly comparable to the EPA rating. - **Trip computers** in many cars report energy taken from the battery, not from the wall. Expect the wall figure to be somewhat higher. - **Short trips in winter** push consumption up because heating the cabin and battery costs energy before the car has gone far. - **Steady highway driving** above about 65 mph usually uses more than the EPA combined figure; see [highway speed and efficiency](https://evchargecosts.com/guides/highway-speed-and-ev-efficiency/). Once you have your own number, enter it in the [charging cost calculator](https://evchargecosts.com/) by choosing a similar vehicle and adjusting, or use the API with the `kwh` parameter. ## Run your own numbers - [Charging cost calculator](https://evchargecosts.com/) - [EV vs gas calculator](https://evchargecosts.com/ev-vs-gas/) - [Charging time calculator](https://evchargecosts.com/charging-time/) - [Cost in your state](https://evchargecosts.com/states/) - [How we calculate](https://evchargecosts.com/methodology/) ## Related guides - [How Much Does It Cost to Charge an Electric Truck?](https://evchargecosts.com/guides/cost-to-charge-an-electric-truck/) - [How Much Does It Cost to Charge an Electric SUV?](https://evchargecosts.com/guides/cost-to-charge-an-electric-suv/) - [The Cheapest Electric Cars to Charge (Most Efficient EVs)](https://evchargecosts.com/guides/cheapest-evs-to-charge/) - [Does Cold Weather Increase EV Charging Cost?](https://evchargecosts.com/guides/cold-weather-ev-charging-cost/) - [Highway Speed and EV Efficiency: What It Costs to Drive Fast](https://evchargecosts.com/guides/highway-speed-and-ev-efficiency/) - [What Is MPGe? MPGe Explained for EV Owners](https://evchargecosts.com/guides/mpge-explained/) [All 59 guides](https://evchargecosts.com/guides/) ## Questions people ask ### Is a lower kWh per 100 miles better? Yes. It means the car needs less electricity, so it costs less to drive each mile. ### Does kWh per 100 miles include charging losses? Yes. EPA measures the energy drawn from the wall outlet, so charging losses are already included. --- Source page: https://evchargecosts.com/guides/what-kwh-per-100-miles-means/ Data: EIA (electricity August 2026, gasoline 2026-10-19), EPA fueleconomy.gov. License: CC BY 4.0.