Usable energy and driving range
Only the charge above your chosen reserve is available for this estimate. Divide that battery energy by measured driving consumption. Do not use wall energy consumption if it includes charging losses, because those losses are not part of the battery energy available to drive.
range(km) = usable kWh × (charge% − reserve%) ÷ consumption(kWh/100 km)
Example with a 75 kWh battery
At 80% charge with a 10% reserve, 52.5 kWh is available. At 18 kWh per 100 km, estimated range is 291.67 km, approximately 181.23 miles. If consumption rises to 24 kWh per 100 km, the same energy provides 218.75 km.
Choosing a realistic consumption input
Use consumption measured at comparable speed, temperature and load. Heating, wind, gradient, rain and battery condition can change the outcome. Usable capacity is the energy available to the vehicle, which may differ from gross cell capacity. This tool does not simulate a route or guarantee reaching a charger.