EV Range Calculator — How Far Will It Go?

Estimate how far an EV goes on a charge. Enter the usable battery size in kWh and the efficiency in miles per kWh.

How this calculator works

Range is the usable battery size multiplied by efficiency (miles per kWh). Real range swings with temperature, speed, terrain, and climate use — treat this as the ideal-conditions figure and shave 10–30% for winter or highway driving.

What changes the number

Cold weather is the big one — range can drop 20–40% near freezing as the battery and cabin heater draw power.
Sustained highway speed cuts EV efficiency sharply; EVs are most efficient in the city — the opposite of gas cars.
Use the usable battery figure, not the gross — a few kWh are held in reserve and not available to drive on.

Frequently asked questions

What efficiency should I use?

Most EVs land between 3 and 4 mi/kWh; small efficient cars do better, trucks and SUVs worse. Use the EPA figure for the model, or your own trip-computer average.

Why is my real range lower than rated?

Cold weather, high speeds, hills, and cabin heating all reduce it. Rated range assumes mild, moderate-speed conditions.

Usable vs total battery?

Manufacturers hold a buffer you can’t use. Enter the usable (net) kWh for an accurate range; it’s a bit smaller than the headline battery size.