Tesla battery capacity calculation
Electric vehicles like Tesla do not directly provide information about total battery capacity in kWh, but this value can be easily calculated from several available data points: current charge level in percent, range and average consumption. Based on these three variables, it is possible to calculate backwards what the theoretical battery capacity would be at 100% charge. For example, if a car has a range of 245 km at 71% charge and an average consumption of 129.4 Wh/km, a simple calculation shows that the battery has approximately 44.6 kWh.
The calculation works by first converting the range to a value corresponding to full battery charge (100%). This distance is then multiplied by the average consumption per kilometer, giving us the total amount of energy the vehicle would consume at this range — and thus an estimate of battery capacity. This method is useful, for example, when monitoring battery degradation, or when comparing with manufacturer's declared values.
Tesla battery capacity calculation
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Estimated battery capacity
This calculation is only indicative and depends on the accuracy of the input data. The range displayed by Tesla changes in real time based on driving style, weather, topography and other factors. Actual usable battery capacity may also differ due to software limits or cell degradation. If you want more accurate numbers, it's ideal to use specialized tools (e.g. Tesla API, Scan My Tesla or Teslafi).
