Range claims need the same measuring stick
CLTC, WLTP and EPA figures come from different test procedures. Placing their headline distances side by side can create a misleading ranking.
Canvas of Knowledge · 14 November 2026 · Illustrated explainerKNOW THE LABEL
China’s light-duty cycle is standardised in GB/T 38146.1-2019. WLTP uses its own prescribed driving procedure. EPA range labels follow US testing and adjustment methods.
MATCH THE CAR
Compare the same battery, wheels, drivetrain and market specification. A nameplate can cover several materially different versions, even before the test method changes.
NO MAGIC CONVERSION
There is no fixed multiplier that reliably converts every CLTC figure into WLTP or EPA range. Weather, speed, heating, cooling, load and route also change the distance a driver actually achieves.
THE IDEA TO KEEPUse matching test methods for comparisons, then plan trips for the conditions you will actually face.
Sources & further reading
- China SAMR · GB/T 38146.1-2019 →
- US EPA · Fuel economy and EV range testing →
- UC Davis Electric Vehicle Research Center · Measurement methods →
Sources reviewed 14 November 2026. Specifications and availability depend on the product, market and date. Source organisations do not endorse this website.