EV Range at Speed Calculator

About this calculator

An electric car's real-world range depends heavily on driving speed, because aerodynamic drag rises with the square of speed, which pushes energy consumption (Wh/km) up sharply above about 100 km/h — meaning the range figure at a steady highway cruise can be noticeably lower than the range at city speeds or the manufacturer's combined-cycle rating. Range at a given speed is usable battery capacity (kWh) ÷ consumption at that speed (Wh/km) × 1000, and driving time is range divided by that same speed.

EV drivers planning a road trip use this calculation because charging stops need to be planned around real range at highway speed, not the optimistic combined-cycle figure on the window sticker — consumption typically quoted at 110–130 km/h can be 30–50% higher than at 90 km/h, which directly shortens usable range between charges.

This calculator takes your usable battery capacity, consumption at your intended cruising speed and that speed, and returns your expected range and driving time, so you can plan charging stops around realistic numbers rather than the sticker range.