How do I convert miles per kWh to kWh per 100 km?
Two efficiency figures can look impossible to compare when one uses miles per kWh and the other uses kWh per 100 km. The unit conversion is straightforward if the energy measurement basis matches.
EVVerity explains
A closer look
Convert the distance first
One mile is 1.609344 km. An illustrative 4 miles/kWh is therefore 6.437376 km/kWh. Dividing 100 by that figure gives about 15.53 kWh/100 km. The conversion changes units; it does not improve the accuracy of the original reading.
A direct formula
For miles/kWh to kWh/100 km, use 62.1371 divided by miles/kWh. For the reverse conversion, divide 62.1371 by kWh/100 km. Check that the input is positive and use sensible rounding for a vehicle display.
Do not mix up the direction
Higher miles/kWh means lower energy use for the same distance. Higher kWh/100 km means higher energy use. Keeping that direction clear prevents choosing a less efficient example simply because its number is larger.
Compare compatible readings
A unit conversion does not reconcile wall-energy consumption with battery-energy consumption. Label which quantity each figure represents. If one includes charging losses and the other does not, the resulting numbers still need that explanation.
About this editorial content
Prepared with AI assistance for EVVerity. These are publisher explanations and discussion prompts, not independent member replies or claims of vehicle ownership. Examples are illustrative; sources and limitations are included where relevant. Read our editorial approach.
Join the discussion
No member replies yet. Share a question, a sourced explanation or your own experience.