Electric Car Range: How to Compare Real-World Figures

A car capable of an estimated 210 miles from full to empty might give you only about 137 miles between planned charging stops. That is not necessarily a fault or a misleading test: you may be setting off at 80% and choosing to arrive with 15% still in reserve.

Those illustrative figures show why advertised range, range in your driving conditions and distance between stops need separate treatment. Start by finding evidence for the exact version you want, then apply it to your journeys.

What the Advertised Range Actually Measures

WLTP is a standardised test procedure. It gives a consistent basis for comparison, but does not promise that every driver will cover the stated distance. Some adverts display a combined range, while others highlight a city figure or the longest-range version in the model family.

Match the figure to the car you are buying. A larger battery, different motor arrangement or smaller wheels can change the official result. A “from” price and an “up to” range may refer to different versions.

For a used vehicle, ask whether the number in the advert is its original official figure or a current assessment. A dashboard range estimate is not a battery-health certificate. It can change with recent driving and conditions, even when the battery itself has not suddenly changed.

Which Real-World Tests Are Comparable?

A useful range comparison needs more than the name of a car and a distance. Look for the following information in a manufacturer's calculator or an independently conducted test:

• Outside temperature and whether the cabin heater or air conditioning was used.
• Road type, speed and the balance of motorway and urban driving.
• Battery charge at the start and end.
• Exact battery, motor and wheel specification.
• Vehicle load and any unusual weather or elevation changes.
• Whether the result was measured or estimated.

Prefer tests that compare cars under broadly consistent conditions. A very efficient summer run in one car is not a fair comparison with another car's cold motorway trip. Owner reports can highlight questions to investigate, but one person's best result should not set your minimum requirement.

From Battery Capacity to Distance Between Stops

The calculation behind the opening example uses both expected efficiency and the portion of the battery available for that journey.

Suppose there is 60kWh of usable battery capacity and the car achieves 3.5 miles per kWh in the conditions you expect. This is a worked illustration, not a result for a particular model:

• Using the full usable capacity would suggest 60 × 3.5 = 210 miles.
• Starting at 80% and planning to arrive at 15% uses 65% of that capacity.
• 60 × 0.65 = 39kWh available for that leg.
• 39 × 3.5 = approximately 137 miles between planned stops.

This is a planning estimate. Efficiency changes during the journey, and battery percentages are not a precision fuel measurement. Follow the manufacturer's charging advice for the particular battery rather than assuming that one daily charge limit suits every EV.

Put the Evidence Against a Winter Motorway Journey

Cold weather, cabin heating, speed and load can reduce the distance achieved. Instead of applying an arbitrary winter penalty, seek a cold-weather test or manufacturer range simulation for the version you want.

Think about your least convenient regular journey: perhaps a late motorway return with children, luggage and no destination charging. Check suitable charging stops along that route and have an alternative in case the first site is busy or unavailable.

A car that easily covers your weekday commute may still need one stop on an occasional long trip. Decide whether that is acceptable before paying more for a larger battery. Our guide to the advantages and drawbacks of electric cars can help you weigh range alongside everyday use.

Charging Time Belongs in the Route Comparison

Two cars with similar range can take different amounts of time to complete a long trip. Check the charging performance over a useful interval, such as the manufacturer's stated 10–80% test, together with its conditions. A peak charging figure does not mean that speed is sustained throughout the session.

Also check the connectors and charging facilities available on your routes. A longer-range car is not automatically quicker or cheaper for your particular journey if the charging stops do not suit it.

For each shortlisted car, record your daily distance, longest regular trip, available home or work charging and relevant winter evidence. Include suitable stops on the longer route rather than ranking cars solely by their largest advertised number.

An Older EV Needs Current Battery Evidence

Battery age and condition matter, but an older car is not automatically unsuitable. Ask for a relevant battery-health assessment, the method used and the date. Check remaining battery warranty terms, mileage limits, capacity provisions and any servicing requirements.

Do not treat the warranty's minimum capacity threshold as the car's current condition. A warranty can still be in force while the car has less usable capacity than it did when new. Equally, a range estimate on a cold morning does not prove degradation.

The used-EV buying checks cover the wider assessment. Compare the current condition evidence with the range your journeys require; the original brochure and a dashboard estimate cannot do that job on their own.