Range
How far the car can go on a full battery, measured on a standard test.
Range is measured on a standard laboratory test so that different cars can be compared fairly. It's the most useful single number when comparing EVs, but it's a test result, not a promise, and which test was used matters a lot.
Check the label next to the number. EPA is the US test and the strictest. WLTP (Europe) usually reads about 10–20% higher than EPA for the same car, and CLTC (China) about 20–30% higher. Never compare an EPA figure directly with a WLTP or CLTC one.
Real driving is different. Steady highway driving at 70–75 mph usually gives less than the EPA figure, often 10–25% less. Cold hurts most: below freezing, heating the cabin and the battery can cut range by roughly 20–40%. Big wheels, roof racks, towing, heavy loads and hills reduce it too. Gentle city driving, where the car recovers energy as it slows down, can match or even beat the rating.
How much do you need? The average American drives about 37 miles a day, and most EV owners charge at home overnight, so daily range is rarely a problem. Range matters most on road trips. There you'll usually drive between about 10% and 80% charge (the fastest part of the battery to refill), so the useful distance between fast-charging stops is roughly 70% of the rated range, and less at highway speed.
| Feature | EPA US Environmental Protection Agency | WLTP Worldwide Harmonised Light Vehicles Test Procedure | CLTC China Light-Duty Vehicle Test Cycle |
|---|---|---|---|
| Used in | United States. | Europe, the UK and many other countries. | China. |
| How it's tested | City and highway runs, then adjusted down to reflect real driving. | A single mixed run at moderate speeds. | Mostly slow, stop-start driving with gentle acceleration. |
| Compared with EPA | The reference. | Usually 10–20% higher. | Usually 20–30% higher. |
| Rough EPA equivalent | The same number. | Multiply by about 0.85. | Multiply by about 0.75. |
| How realistic | The most realistic. | Somewhat optimistic. | The most optimistic. |
Conversions are rough rules of thumb from cars rated on more than one test; the real gap varies from car to car.