PenniTools

EV Range Calculator

Estimate range from battery capacity and efficiency.

Battery capacity (kWh)

Efficiency (km/kWh)

Estimated range240 km

This is a simple estimate. Actual range varies with speed, traffic, temperature, load, terrain and driving style.

How to interpret an EV range estimate

The simple estimate multiplies usable battery energy in kWh by distance efficiency in km/kWh. For example, a 40 kWh usable battery and an assumed 6 km/kWh efficiency give 40 × 6 = 240 km. Use usable battery capacity rather than assuming all advertised gross capacity is available for driving.

Why real range changes

Highway speeds generally use more energy per kilometre than steady moderate speeds.
Air-conditioning or heating, hills, payload, tyre pressure, rain and temperature can change efficiency.
Keep a reserve for charging availability and unexpected detours rather than planning to arrive at 0%.
Vehicle displays and manufacturer range figures use different test conditions; this tool is a simple estimate, not a guarantee.

Use your own recent trip efficiency when possible. Check the vehicle manual and current charging network information before a long journey.