Compare used-EV range ratings and reported driving tests

The short answer

A used EV's range figures come from different sources: a seller's listing claim, an official rating (EPA in the US, WLTP in many other markets), and drives reported by journalists or owners. They are not interchangeable numbers on one scale. Each was produced by a different method, under different conditions, often for a specific model year, market and trim. To compare used EVs fairly, put every figure in the same distance unit, keep a record of where it came from and how it was produced, and compare only like with like: rating against rating for matching configurations, and reported drive against reported drive when speed, temperature and charge endpoints are known.

Converting kilometers to miles is legitimate. Converting a WLTP figure into an EPA-equivalent figure with a rule-of-thumb multiplier is not, because the two procedures use different drive cycles and calculation methods.

Terms worth getting straight first

• Driving range: on the US EPA electric-vehicle label, the approximate combined city/highway miles a vehicle can travel on a full charge before it needs recharging.
• Energy consumption (kWh/100 miles): how much electricity the vehicle uses to travel 100 miles. It is a rate, shown separately from range, and lower is more efficient.
• Drive cycle: a prescribed schedule of speed against time that a vehicle follows during laboratory testing.
• WLTP and WLTC: the Worldwide harmonized Light vehicles Test Procedure is the overall method; the WLTC is the speed-against-time cycle, divided into speed phases, that vehicles drive during it.
• Chassis dynamometer: a set of rollers that lets a vehicle be driven through a cycle in a laboratory while standing still.
• Usable energy: the portion of the battery's capacity the vehicle can actually draw on, as opposed to its total or gross capacity.

What an EPA range rating represents

EPA laboratory testing has the vehicle follow prescribed speed-against-time cycles. For EV range estimation, the test continues until the battery can no longer supply the power needed to follow the required speed and acceleration. Since the 2008 model year, EPA estimates have also incorporated additional tests that adjust city and highway results for higher speeds, air-conditioning use and cold temperatures.

The label's range figure is a combined city/highway value. That makes it useful for comparing two EVs rated under the same system, but it is a standardized estimate rather than a promise for any particular trip. Note the label's kWh/100 miles figure alongside range: two cars with similar range can reach it in different ways, one with a larger battery and higher consumption, the other with a smaller battery and lower consumption.

What a WLTP range figure represents

WLTP procedures, as set out in UN Regulation 154 (the edition published June 26, 2026), run the vehicle through the applicable WLTC speed phases on a chassis dynamometer, with defined rules for preconditioning, charging and drive-mode selection. The regulation provides both a consecutive-cycle procedure and a shortened procedure, and calculates pure-electric range from measured usable battery energy and the energy consumed over the cycles.

WLTP can produce both a combined range and a city range for the same vehicle. A city figure is typically larger than a combined figure, so record which one a source is quoting. If a listing or article gives a single unlabeled WLTP number, treat its basis as unknown rather than assuming it is combined.

The current regulation text does not tell you which edition or procedure governed the certification of an older vehicle. For a used EV, the relevant rating is the one issued for that vehicle's model year and market, and it should be recorded as such.

What a reported driving test tells you

Reported drives show how one car performed on one occasion under stated conditions. Their value depends almost entirely on how well those conditions were controlled and recorded. A useful example is Tom Moloughney's 70 mph range test for InsideEVs, published March 13, 2021.

• Vehicle: 2021 Volkswagen ID.4 First Edition.
• Route: New Jersey Turnpike, driven in loops to offset elevation changes.
• Speed: 70 mph, checked by GPS.
• Charge endpoints: started at 100% and ended at 2%, with DC fast charging immediately before the drive.
• Temperature: 40–48°F.
• Settings: recommended tire pressure, ECO/range mode, and cabin heat at 68°F with low fan when it was cold.
• Result: 230 miles driven.

The author cited a 250-mile EPA rating and battery specifications of 82 kWh total and 77 kWh usable. Those are manufacturer and rating figures, not measurements of that car's battery health. The report also recorded the car's remaining-distance estimates, which are projections and separate from the miles actually driven.

The figure to record from this test is the observed 230 miles at a sustained 70 mph in cool weather, from 100% to 2%. Do not stretch it into a full-battery figure by projecting the unused 2%, and do not treat it as what any ID.4 will do. It describes one new car at one speed in one temperature band. A used example, a different trim or wheel package, warmer or colder weather, or a different speed could all produce a different result.

How the range sources compare

Source	What it measures	Strength	Main limitation
EPA rating	Standardized combined city/highway range from lab cycles with adjustment tests	Same method across vehicles rated in the US system	Estimate tied to the rated model year and configuration, not a specific trip or a specific used car
WLTP rating	Range from WLTC phases on a dynamometer, calculated from usable energy and cycle consumption	Consistent within WLTP markets; separate combined and city values	Different cycle and calculation from EPA; must check which value is quoted and which procedure applied to that model year
Reported drive	Distance actually covered by one car under stated conditions	Shows behavior at a real sustained speed, temperature and route	Only as comparable as its recorded conditions; one car, one occasion
Listing claim	Whatever the seller chose to state	Starting point for questions	Source, configuration and method often unstated; may be a rating for another trim, a dashboard estimate or a guess
Dashboard remaining-range estimate	The car's projection of distance left	Shows what the car itself predicts	A projection, not a measured distance

Build a comparison worksheet

A simple worksheet keeps every figure tied to its context, so you do not end up ranking a lab rating against a highway test without noticing. Give each vehicle one block of rows and each range figure its own row.

VEHICLE RECORD
  Listing claim (as written):
  Model year | Market | Trim | Drivetrain | Battery | Wheels:

RATING ROWS (one per rating)
  Organization | Cycle/value type (e.g. combined, city) | Source and date
  Original distance + unit | Common-unit distance | Conversion factor used

REPORTED DRIVE ROWS (one per drive)
  Author | Date | Method
  Observed distance | Speed (and how checked) | Temperature/weather
  Route | Start charge % | End charge %
  Battery evidence linked to this specific car (if any)

RULES
  Unreported condition  -> write "unreported"
  Estimate or projection -> label "projection"

Write "unreported" rather than leaving a gap or filling in a likely value. A blank invites assumptions, while "unreported" makes it obvious when two rows cannot be fairly compared.

Convert units, not test methods

One international mile is defined as exactly 1.609344 kilometers. To put a kilometer figure into miles, divide by 1.609344; to go from miles to kilometers, multiply by it. For example, 400 km divided by 1.609344 is about 248.5 miles. Record the original figure and unit next to the converted one so the conversion can be checked.

That conversion changes only the unit. The converted number is still a WLTP result and belongs in a WLTP row. Avoid any shortcut that scales WLTP figures up or down to "EPA equivalent" values, because the procedures differ in their cycles and calculations and no single factor accounts for that across vehicles.

Illustrative example: two listings that don't line up yet

This is a hypothetical case, not data on real vehicles. Car A has a documented 250-mile EPA combined rating for its model year and trim. Car B's listing points to a reported 240-mile drive, but the report gives no speed.

It is tempting to say A beats B by 10 miles, but the figures are different kinds of evidence: a standardized lab rating against a single drive with an unknown speed. Keep both rows in the worksheet and hold off on ranking. Next, find the official rating for B's exact configuration, or a reported drive for A run under conditions similar to B's, then compare matching evidence. Do not project either figure into a promised trip range.

Which figure to rely on for your decision

• Shortlisting several used EVs: compare official ratings from the same system (EPA against EPA, or WLTP combined against WLTP combined) for each car's exact model year, market and configuration. Pair each with its kWh/100 miles or equivalent consumption figure.
• Regular long highway trips: look for reported drives at a stated, ideally GPS-checked, sustained speed close to your own, with recorded temperature and charge endpoints. Compare cars only on tests with similar speed and weather.
• Cold-climate driving: give weight to reported drives that state the temperature and cabin-heat settings, and record temperature for every drive you note.
• Imported or grey-market vehicles: record the rating that applied in the car's original market and label it with its system and value type instead of converting it into another system.
• A listing that only states a number: treat it as a claim to check. Ask the seller where the figure came from and for which trim and year, then replace it with a sourced rating or test.

Keep range ratings separate from battery condition

Ratings and published tests describe a model's performance when it was rated or tested, usually as a new car. They say nothing about how much capacity a particular used battery has kept. Assess the specific car's battery condition separately, with evidence tied to that vehicle, and link it to the vehicle's row in your worksheet rather than adjusting rated or tested ranges to guess at it.