EvRangeTarget helps you get where you want to at the battery percentage you want in your electric vehicle (EV). It calculates the average mi/kwh or km/kwh energy economy/consumption you need to hit in order to get to your destination at an optimum speed, efficiency, and remaining battery level.

Set your own target percentage and low-threshold percentage, battery capacity and unit (km or miles).

How it works:
Let’s say you’ve charged to 90% and need to travel another 70 miles. Simply plug in those two numbers and it’ll tell you that at 3.7 miles/kwh you’ll arrive at 5% charge and at 4.2 miles/kwh you will arrive at 15%.

Simple as this is, it greatly reduces range anxiety and travel-time-anxiety. All you need to do now is try and keep your average energy-economy above what you need. If it dips under you need to slow down a bit. If it goes over you can afford to add a little speed. Using EvRangeTarget helps you get to know your electric vehicle’s capabilities simply and practically.

This will work with any electric car that has an energy-economy display (miles per kwh or km per kwh). Ideally an average energy economy. Electric cars such as the BMW i3 and i8, Nissan Leaf and e-NV200, Renault Zoe, VW e Golf and e-Up, Kia Soul EV, Tesla Model S, X and roadster. Hybrids such as Vauxhall Ampera, Chevrolet Volt, and Toyota Prius

miles per kwh is the electric equivalent of mpg - how far you can get for the amount of fuel or energy currently in the vehicle.