EV AC Range Impact Calculator Guide
Unlike combustion engines that use waste heat for the cabin, EVs run their AC entirely on battery power. On a hot day at full blast, the AC can draw 2β2.5 kW β enough to cut range by 15β25% in city driving. This calculator shows exactly how much your efficiency drops based on AC intensity, temperature, and speed.
AC Power Draw by Setting
Low setting draws approximately 0.8 kW, medium about 1.5 kW, and max cooling around 2.5 kW. At highway speeds the AC is a smaller share of total power consumption. At city speeds (30β40 mph) the AC can account for 20β40% of all power used.
Tips to Reduce AC Power Drain
Use pre-conditioning while plugged in to cool the cabin before departure β this uses grid power instead of battery. Parking in shade, using seat ventilation, and keeping AC on "recirculate" mode also reduce the power load significantly.
Frequently Asked Questions
Typically 10β20% in city driving with medium AC. At highway speeds the impact drops to 5β10% since driving consumes much more power proportionally.
Yes β resistive heaters draw 2β5 kW, more than most AC systems. Heat pumps (available on many new EVs) reduce winter heating consumption by 50β70%.
Pre-conditioning cools the cabin while the car is still plugged in, so you start your trip with a comfortable temperature without drawing on the driving battery.