WLTP vs CLTC: What You Need to Know About EV Range Standards

Updated August 2026 with fresh real-world test data and a closer look at how EV Database calculates its range estimates.

When you read specifications for EVs, one of the first things that grabs attention is the claimed range. That number can be quite different depending on the testing standard used. In Europe, the standard is known as WLTP, the Worldwide Harmonised Light Vehicles Test Procedure, while in China the standard is CLTC, the China Light-Duty Vehicle Test Cycle. These standards are laboratory test procedures aimed at producing comparable figures for a range on a single charge. While both are more reliable than older NEDC testing cycle, they measure very different things, and neither one tells you what you’ll actually get on your daily drive.

Here’s how the two standards stack up against each other.

Feature	WLTP	CLTC
Test duration	1,800 seconds (30 minutes), about 23.25 km	1,800 seconds (30 minutes), about 14.5 km
Average speed	46.5 km/h	28.96 km/h
Top speed reached	131.3 km/h (Extra High phase)	114 km/h
Driving phases	Low, Medium, High, Extra High	Low, Medium, High, with a heavier weighting toward low speed
Idle time	About 13 percent of the cycle	About 22 percent of the cycle
Typical real world gap	Roughly 10 to 20 percent lower in mixed driving	Roughly 20 to 25 percent higher than WLTP for the same car
Introduced	2017, under UNECE Global Technical Regulation No. 15	2019, under national standard GB/T 38146.1-2019
Developed by	UNECE working group, adopted into EU law	China Automotive Technology and Research Center (CATARC)

What CLTC is and why the numbers run higher

CLTC is in force since May 2020. It was built by CATARC using real driving data pulled from more than 3,700 vehicles across 40 Chinese cities, so it genuinely reflects how people drive there. The problem for anyone outside China is that Chinese urban traffic looks nothing like a European motorway. CLTC’s passenger car cycle, CLTC-P, averages just 28.96 km/h and tops out at 114 km/h, against WLTP’s 46.5 km/h average and 131.3 km/h peak. Idle time makes up about 22 percent of the CLTC cycle, nearly double WLTP’s share.

Lower speeds and more idling both work in an EV’s favor on paper, since aerodynamic drag drops sharply at lower speed and regenerative braking gets more opportunities to recover energy during stop and go traffic. That’s why the same car posts a noticeably longer number under CLTC than under WLTP. Going by the conversion factors autoevolution uses when comparing the three global test cycles, CLTC ratings typically run about 20 to 25 percent higher than WLTP for an identical car, meaning the WLTP equivalent works out to roughly the CLTC figure divided by 1.2 to 1.25. Here’s what that looks like at a few common CLTC ratings.

Advertised CLTC	Expected WLTP equivalent
400 km	320 to 335 km
500 km	400 to 415 km
600 km	480 to 500 km
700 km	560 to 585 km

So a Chinese brand advertising 700 km CLTC for a model sold in Europe is really looking at something closer to 560 to 585 km under WLTP conditions for the same battery and drivetrain, and that’s before you even get to real world driving.

How to estimate your real world range from WLTP or CLTC

Every lab test, WLTP included, is measured in ideal conditions: mild temperature, no headwind, no hills, no HVAC running. Real driving includes all of that, so the gap between the sticker number and what you actually see is normal, not a sign anything is wrong with the car.

Gridserve, the UK charging network, puts the everyday range for most EVs at around 80 to 90 percent of WLTP in typical mixed driving. Independent testing tends to confirm that, though the gap widens a lot at speed and in the cold. ADAC, Germany’s largest motoring organisation, ran a winter test in January 2026 with 14 family EVs, all rated at 500 km WLTP or more, driven on a simulated 582 km motorway route at close to 0°C. None of them matched their WLTP figure, and the results varied widely depending on how well each car’s heat pump and route planning software coped with the cold.

The most extreme version of this test is Norway’s El Prix, run twice a year by the Norwegian Automobile Federation together with Motor magazine, and recognised by the FIA as the world’s largest independent EV test. The January 2026 winter edition pushed 24 cars down to minus 31°C. The Lucid Air Grand Touring covered the most distance at 519 km, but that’s still well short of its 960 km WLTP rating, a gap of about 46 percent. Most cars in that test lost somewhere between 29 and 46 percent of their WLTP range in extreme cold, according to Electrek’s coverage of the results. Not every car takes that big a hit though. Green NCAP’s own real world testing found the BYD Sealion 7 dropped from 400 km in warm conditions to 337 km in the cold, a loss of about 16 percent, which shows how much the outcome depends on the specific car’s thermal management rather than the test itself.

For a rough estimate, treat WLTP as your best case and subtract 10 to 20 percent for normal mixed driving, or 30 to 40 percent if you’re driving at sustained motorway speed in freezing weather. Here’s what that looks like at a few common WLTP ratings.

WLTP	Normal mixed driving	Motorway in freezing weather
400 km	320 to 360 km	240 to 280 km
500 km	400 to 450 km	300 to 350 km
600 km	480 to 540 km	360 to 420 km
700 km	560 to 630 km	420 to 490 km

For CLTC, since it’s already inflated relative to WLTP, subtract 30 to 40 percent to land somewhere close to a realistic figure, and treat the WLTP equivalent (roughly CLTC divided by 1.2 to 1.25, as shown in the table above) as a better starting point than the raw CLTC number.

What EV Database’s real range figures actually measure

EV Database, the site at ev-database.org that’s become a go to reference for buyers comparing real world range, gets cited constantly, and it’s worth being precise about what its numbers actually are, because they are not road test results. EV Database calculates its Real Range by applying a model to each car’s WLTP data, adjusting for weather and speed assumptions rather than driving the car until the battery runs out.

Take the current Tesla Model 3 RWD as an example. It carries a WLTP rating of 534 km. EV Database’s own page for that car lists a Real Range of 450 km combined, but that single number hides a much wider spread: 660 km in city driving in mild weather, down to 325 km on the motorway in cold weather, with combined figures of 530 km mild and 370 km cold. The site defines mild weather as 23°C with no air conditioning, cold weather as minus 10°C with the heater running, and its highway figures assume a constant 110 km/h. Every one of those numbers is a calculated estimate, not a measured result, and EV Database says as much on the page itself.

That’s a genuinely useful way to see how much conditions matter, and it’s far more informative than a single WLTP figure. It’s a model built from good assumptions, not fieldwork. If you want figures from an EV that’s actually been driven until it stopped, Norwegian YouTuber Bjørn Nyland’s standardised range tests at 90 and 120 km/h, aggregated on sites like Zerofy under a similarly named EV database, are a genuine road test dataset and a useful complement, not a substitute, for EV Database’s own modelled numbers.

EV Database also publishes a metric called 1-Stop Range, which is the total distance a car can cover with one 15 minute fast charging stop included. For long distance driving, that number is arguably more useful than either WLTP or Real Range on its own, since it accounts for how fast the car actually charges rather than just how big its battery is.

How WLTP testing works and who runs it

WLTP replaced NEDC for new car types in September 2017, and for all new registrations from September 2018. It’s a chassis dynamometer test, meaning the car sits on rollers in a lab rather than driving on a road, and it runs through four speed phases named Low, Medium, High and Extra High. The whole cycle covers about 23 km in 30 minutes at an average of 46.5 km/h, though the Extra High phase briefly touches 131.3 km/h to simulate motorway driving.

The test is done at a controlled 23°C, with no heating or air conditioning running, and it factors in the car’s exact configuration, meaning wheel size, roof rails, and other options that add weight or drag. That last part matters, because it’s one of the reasons a base trim and a fully loaded version of the same EV can carry different WLTP figures.

Manufacturers don’t get to self certify these numbers. Testing has to happen at accredited, independent labs under EU type approval rules, separate from the carmaker. The Vehicle Emissions Laboratories in Ispra, Italy, run by the European Commission’s Joint Research Centre, is one such facility. TÜV SÜD operates similar accredited labs for WLTP and Real Driving Emissions testing. Both are structurally separate from the manufacturers whose cars they test, which is the whole point of the system.

Final thoughts

None of these numbers are wrong, exactly. WLTP and CLTC are both legitimate standards doing what they were designed to do: give a consistent, repeatable number for comparing cars against each other under the same conditions. The mistake is treating either one as a promise about your own driving. Once you know how each test is built, and once you understand that even a well known reference like EV Database is running a calculation rather than a road test, it gets a lot easier to read past the marketing number and land on a range you can actually plan around.

FAQ

Why does WLTP give lower numbers than CLTC?
WLTP tests at higher average and top speeds with more time spent in demanding driving phases, while CLTC weights heavily toward slow, stop and go city driving where EVs are most efficient.

Who performs WLTP testing?
Independent, accredited labs separate from the manufacturer, such as the European Commission’s Joint Research Centre facility in Ispra or TÜV SÜD’s testing centres, operating under EU type approval oversight.

Which standard is used in Europe?
WLTP is mandatory for every new car sold in the EU. CLTC only applies to vehicles certified for the Chinese market, even if the same model is later sold in Europe under a WLTP rating.

How much higher are CLTC values compared to WLTP?
Around 20 to 25 percent for the same car, though the exact gap depends on the vehicle’s aerodynamics and how much it benefits from slow, stop and go driving.

Featured Image Source: BYD