EV Range Explained — How Far Can an Electric Car Go?

The basic formula for estimating range is straightforward: divide the battery capacity by the vehicle's energy consumption.

Battery size (kWh) ÷ EV efficiency (kWh per 100 km) × 100 = Estimated range (km)

For example, an EV with a 100 kWh battery and an efficiency of 16 kWh per 100 km has an estimated range of 625 km. A smaller vehicle with a 60 kWh battery using 14 kWh per 100 km would have an estimated range of about 430 km.

In practice, the actual range you get depends on driving conditions, speed, temperature and how the vehicle is used. Manufacturer range figures are based on standardised test conditions and typically represent a best-case scenario.

Manufacturer range figures are measured under standardised test cycles such as WLTP (Worldwide Harmonised Light Vehicle Test Procedure). These tests are conducted under controlled conditions — moderate speeds, minimal climate control, flat roads — which do not always reflect how people drive in the real world.

Most EV owners find that their actual range is somewhere between 10 and 20 percent below the rated figure in everyday conditions. The gap can be larger or smaller depending on how the vehicle is driven and the conditions on the day.

These are general estimates. Actual range varies by vehicle, driving conditions, speed and climate control use.

Speed

Speed has one of the largest effects on range. Energy consumption increases significantly at highway speeds compared with urban driving. An EV that uses 14 kWh per 100 km in the city may use 20 kWh per 100 km or more at sustained highway speed. This is because aerodynamic drag increases with the square of speed — driving faster requires disproportionately more energy.

Temperature

Cold weather reduces EV range by a meaningful amount, typically somewhere between 10 and 30 percent depending on the vehicle, temperature and how heavily climate control is used. The battery itself is less efficient in cold conditions, and heating the cabin draws power directly from the battery rather than from waste engine heat as in a petrol car.

Hot weather has a smaller effect on range, though air conditioning does draw power from the battery. In Australian conditions, the impact of heat on range is generally modest compared with the effect of cold on range.

Climate control

Heating and air conditioning both draw energy from the battery. Cabin heating has the largest impact because it requires significant power, particularly in cold conditions. Air conditioning in warm weather uses less energy but still reduces range. Using seat heating instead of full cabin heating where available, and preconditioning the cabin while still plugged in, can help reduce the impact on range.

Driving style

Smoother, more consistent driving generally extends range compared with frequent heavy acceleration and hard braking. Regenerative braking — where the electric motor recovers energy when slowing down — works best with gradual deceleration. An anticipatory driving style that avoids sudden stops makes better use of this feature.

Terrain

Hilly terrain increases energy consumption on climbs, though some of that energy is recovered on the way down through regenerative braking. Sustained uphill driving, such as mountain passes, can reduce range more than flat driving. The net effect depends on the route profile — a route that climbs and then descends will use more energy than a flat route of the same distance, but less than a route that is uphill in both directions.

Tyre pressure and vehicle load

Underinflated tyres increase rolling resistance and reduce range. Keeping tyres at the manufacturer's recommended pressure is one of the simplest ways to maintain efficiency. Carrying heavy loads or roof-mounted accessories also increases energy consumption.

The table below shows approximate range loss for common driving scenarios. These figures represent the percentage reduction from the vehicle's rated range under those conditions. If you select your vehicle in the My EV panel, this table updates to show range estimates based on your vehicle's actual battery size and efficiency.

Most Australians drive around 30 to 50 km per day on average. Even an EV with a modest 40 kWh battery and a real-world range of 250 km covers several days of typical driving before needing a charge.

For everyday commuting and errands, range is rarely a practical concern with any modern EV. The question becomes more relevant for longer trips — road trips, regional travel or interstate driving — where charging stops need to be planned around available infrastructure.

The key insight is that range needs are not fixed. An EV with 400 km of real-world range covers the vast majority of Australian daily driving needs comfortably, and longer trips are managed by planning charging stops along the way.

Precondition while plugged in

If your EV is plugged in before you leave, use the vehicle's preconditioning feature to heat or cool the cabin using grid power rather than battery power. This means the climate control has already done its work before you depart, so less battery energy is used for heating or cooling on the road.

Moderate your speed on highways

Reducing speed by even 10 km/h on the highway can make a noticeable difference to range. The energy savings from lower aerodynamic drag compound over long distances. On a road trip where you need to reach a charger, slowing down slightly can provide meaningful extra range.

Use regenerative braking effectively

Most EVs allow you to adjust the level of regenerative braking. Using a higher regen setting recovers more energy when decelerating, which extends range in stop-and-go traffic. An anticipatory driving style — lifting off the accelerator early and coasting into stops — maximises the energy recovered.

Keep tyres inflated correctly

Check tyre pressures regularly and keep them at the manufacturer's recommended level. Underinflated tyres increase rolling resistance and can reduce range by several percent.

Plan charging stops for longer trips

For road trips, plan charging stops in advance using an app such as PlugShare or A Better Route Planner (ABRP). Aim to arrive at each charging stop with at least 10 to 20 percent battery remaining. Charging from 10% to 80% is the fastest window on DC fast chargers, so planning around this range keeps stops short and efficient.

Australia's public DC fast charging network has expanded significantly, with chargers along most major highway corridors and in regional centres. For well-served routes such as the east coast highway, Melbourne to Adelaide or Perth to the south west, long distance EV travel is practical with moderate planning.

The main considerations for road trips are the distance between charging stops, the charger power available and the vehicle's DC fast charging capability. Most modern EVs can add 200 to 300 km of range in 20 to 40 minutes at a DC fast charger, which aligns well with a rest or meal stop.

For more remote routes, spacing between chargers can be wider, so checking coverage in advance is important. Apps such as PlugShare and A Better Route Planner show charger locations and let you plan routes based on your vehicle's specific range and efficiency.