Electric Car Efficiency Converter

Convert between different electric car efficiency metrics such as kWh/100mi, mi/kWh, kWh/100km, km/kWh, Wh/mi, and Wh/km.

Efficiency Value Enter the efficiency value you want to convert.

From Unit Select the current unit of your efficiency value.

Lower values of kWh/100mi or Wh/mi indicate better efficiency (less energy used).
Higher values of mi/kWh or km/kWh indicate better efficiency (more distance per unit of energy).
Most modern EVs have efficiency ratings between 25-40 kWh/100mi (250-400 Wh/mi).
EPA ratings for electric cars typically use kWh/100mi in the US, while mi/kWh is easier for consumers to understand.
European EV efficiency is often reported in Wh/km or kWh/100km.
Electric car efficiency varies significantly with driving conditions, speed, climate control use, and temperature.