Calculate Your Electric Vehicle Range Instantly
Enter your EV battery capacity (kWh) and efficiency (km/kWh or kWh/100km) to calculate your real-world driving range in kilometres. Includes formula, reference table for popular EVs, and tips to maximise range — free, no sign-up needed.
Your electric vehicle's range depends on two things: how much energy is stored in the battery (kWh) and how efficiently your car uses that energy (km/kWh). This converter combines both values to give you an accurate estimated range in kilometres.
Kilowatt-hours (kWh) measure the total energy stored in your EV's battery pack. A larger kWh number means more energy stored and potentially more range. For example, a 75 kWh battery stores more energy than a 40 kWh battery. Most modern EVs range from 30 kWh (city EVs) to 100+ kWh (long-range models).
Efficiency tells you how many kilometres your EV can travel on 1 kWh of energy. A higher km/kWh means better efficiency. Most EVs achieve between 5–8 km/kWh in real-world conditions. Efficiency can also be expressed as kWh/100km — the energy consumed per 100 kilometres driven.
EV range is calculated by multiplying battery capacity by efficiency: Range (km) = Battery (kWh) × Efficiency (km/kWh). For example, a 75 kWh battery at 6 km/kWh gives 450 km of range. This converter does the calculation instantly — just enter your values and hit Convert.
Enter battery capacity and efficiency to calculate your EV range in km
The EV range formula is straightforward: multiply battery capacity (kWh) by efficiency (km/kWh). Efficiency can also be expressed as kWh/100km — a common format used by European manufacturers and the WLTP testing standard. Both formulas below are equivalent.
The table below shows real-world range estimates for popular electric vehicles in 2026, based on battery capacity and average real-world efficiency. Rated ranges are based on WLTP figures; real-world estimates apply a 0.85 real-world factor.
| EV Model | Battery (kWh) | Efficiency (km/kWh) | Rated Range (km) | Real-World Est. (km) |
|---|---|---|---|---|
| Tesla Model 3 Long Range | 75 kWh | 6.1 km/kWh | 629 km | ~535 km |
| Tesla Model S Plaid | 100 kWh | 5.9 km/kWh | 600 km | ~510 km |
| Hyundai IONIQ 6 (2WD) | 82 kWh | 6.4 km/kWh | 614 km | ~522 km |
| BMW iX3 | 77 kWh | 5.8 km/kWh | 460 km | ~391 km |
| Nissan Leaf (40 kWh) | 40 kWh | 5.6 km/kWh | 270 km | ~229 km |
| Volkswagen ID.4 | 77 kWh | 6.0 km/kWh | 522 km | ~444 km |
| BYD Atto 3 | 60 kWh | 6.7 km/kWh | 420 km | ~357 km |
| Rivian R1T (Standard) | 100 kWh | 5.5 km/kWh | 483 km | ~411 km |
| MG ZS EV (Long Range) | 72 kWh | 5.9 km/kWh | 440 km | ~374 km |
| Kia EV6 Long Range | 77.4 kWh | 6.3 km/kWh | 528 km | ~449 km |
The table below shows how range changes at different efficiency levels. Use this to estimate your range based on your battery size and typical driving conditions — city driving tends to be more efficient, while motorway driving at high speed uses more energy.
| Battery (kWh) | 4 km/kWh (Heavy) | 5 km/kWh (Mixed) | 6 km/kWh (Efficient) | 7 km/kWh (City) |
|---|---|---|---|---|
| 30 kWh | 120 km | 150 km | 180 km | 210 km |
| 40 kWh | 160 km | 200 km | 240 km | 280 km |
| 50 kWh | 200 km | 250 km | 300 km | 350 km |
| 60 kWh | 240 km | 300 km | 360 km | 420 km |
| 75 kWh | 300 km | 375 km | 450 km | 525 km |
| 82 kWh | 328 km | 410 km | 492 km | 574 km |
| 100 kWh | 400 km | 500 km | 600 km | 700 km |
| 120 kWh | 480 km | 600 km | 720 km | 840 km |
Real-world EV range in kilometres can vary significantly from the rated figure. Understanding what affects your kWh-to-km efficiency helps you plan journeys accurately and get the most from every charge.
Cold weather is the biggest range killer for EVs. At 0°C, battery range can drop by 20–40% due to reduced battery chemistry efficiency and the energy cost of heating the cabin. Hot weather also reduces range slightly due to air conditioning load. Ideal battery temperature is between 20–30°C for maximum km/kWh.
Aerodynamic drag increases sharply with speed — driving at 120 km/h uses roughly 50% more energy per km than driving at 80 km/h. Smooth, consistent driving with gentle acceleration and regenerative braking maximises range. Aggressive acceleration dramatically reduces km/kWh efficiency.
Heating the cabin uses significant battery energy — in cold climates this can consume 2–5 kWh per hour, directly reducing driving range. Heat pumps (used in Tesla Model 3, Hyundai IONIQ 6, and others) are 2–3× more efficient than resistive heaters, making a big difference to real-world kWh-to-km performance.
Hilly or mountainous terrain increases energy consumption on climbs but also enables regenerative braking on descents — which partially recoups energy. City driving with frequent stops is often more efficient for EVs than motorway driving because regenerative braking captures energy that petrol cars lose as heat.
EV batteries degrade over time. After 5–8 years, most EV batteries retain 80–90% of their original capacity. A 75 kWh battery at 85% health effectively becomes a 63.75 kWh battery, reducing your range proportionally. Most manufacturers warrant battery capacity to 70–80% over 8–10 years.
Carrying extra passengers or cargo increases energy consumption. Under-inflated tyres also increase rolling resistance, reducing km/kWh. Keeping tyres at the recommended pressure (typically 2.5–3.0 bar) can improve efficiency by 1–3%. Roof racks and accessories that increase aerodynamic drag also reduce range.
WLTP (Worldwide Harmonised Light Vehicle Test Procedure) is used in Europe and Australia. EPA (Environmental Protection Agency) testing is used in the USA. EPA figures are generally 10–15% lower than WLTP and closer to real-world performance.
EV Range Standards →A kilowatt-hour (kWh) is a unit of energy equal to 1,000 watts used for 1 hour. It is the standard unit for measuring electricity consumption and EV battery capacity. 1 kWh = 3,600,000 joules = 3.6 MJ.
Energy Conversions →Real-world EV efficiency data varies by model, year, and driving conditions. For the most up-to-date efficiency figures for your specific EV, check your vehicle's onboard trip computer or use a dedicated EV database.
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