Pick your vehicle or enter specs manually, set your charge level and driving conditions, then calculate. Formula: Range = Available Energy ÷ Efficiency, adjusted for speed, temperature, and climate control.
Your Vehicle
Optional — select your vehicle to auto-fill battery capacity and efficiency below, or skip this and enter your own values.
Vehicle battery and efficiency figures are typical published specifications per trim and may vary by model year, options, drivetrain, wheel size, and software updates. Figures noted as unavailable have not been independently confirmed against manufacturer or EPA documentation this session. Always verify your exact vehicle's specs against your owner's manual, window sticker, or manufacturer's site.
Charge Level & Driving Conditions
Not sure what a field means? Tap the ⓘ next to its label.
These three factors matter, but not everyone knows them in advance — leave this closed and the calculator uses neutral defaults (flat terrain, normal driving, driver only), or open it and dial them in for a more precise number.
Your Results
This chart holds your other inputs steady and shows how your estimated range would change at common trip speeds. The bar closest to your entered speed is highlighted blue.
How each condition changed your range versus the rated-efficiency baseline. A factor above 0% adds range; below 0% costs range.
Results are for reference and estimation only. Actual range varies with battery health, wind, precise driving behavior, and vehicle-specific factors. See full disclaimer below.
Typical real-world range impact for common conditions, drawn from fleet and manufacturer studies. Use this to sanity-check a calculated result at a glance — your own vehicle and inputs above will differ from these general figures.
| Condition | Typical Range Impact | Why |
|---|---|---|
| 55 → 75 mph | −30% to −40% | Aerodynamic drag scales with speed squared |
| 0°F, heater on | −25% to −40% | Battery chemistry loss plus cabin heating draw |
| 0°F, heat pump vs. resistive | +5 to +15 pts better | Heat pump moves 2–3× more heat per kWh |
| 95°F, AC heavy | −12% to −18% | Compressor draw plus battery cooling |
| Mountainous terrain | −15% to −25% | Climbing cost exceeds regen recovery on descent |
| Sport / aggressive driving | −10% to −20% | Hard acceleration is the largest controllable energy sink |
A deeper look at what actually determines EV range, beyond the sticker number — written for trip planning and general reference alike.
The Most Efficient Speed Isn't the Highway
Aerodynamic drag force grows with the square of speed, so energy use per mile rises sharply as speed increases. Most EVs are most efficient between about 25 and 35 mph — city and suburban driving — and lose a disproportionate share of range on the highway. Dropping from 75 mph to 65 mph commonly recovers a meaningful chunk of range for only a few minutes of extra trip time.
Cold Weather and Battery Chemistry
Lithium-ion batteries rely on chemical reactions that slow down in the cold, raising internal resistance and reducing how much of the pack's energy is usable. Some of that lost energy also goes toward keeping the battery warm enough to operate safely. This effect exists even with the cabin heater off, though it's smaller than the heater's own draw.
Heat Pump vs. Resistive Heat
A resistive (PTC) heater works like a toaster — it converts electricity to heat at close to a one-to-one ratio. A heat pump instead moves heat using a refrigeration cycle in reverse, typically delivering two to three times more heat per kilowatt-hour, especially above freezing. Below roughly 10°F, heat pumps lose some of that advantage and start to behave more like resistive heaters.
Terrain and Regenerative Braking
Climbing a hill costs real energy that regenerative braking only partially recovers on the way back down — friction, motor and inverter losses, and the battery's own charge-acceptance limits mean regen never returns 100% of what climbing used. Net elevation change over a route matters more than how hilly it feels while driving.
Driving Mode and Load
Hard acceleration is one of the largest controllable energy costs — Sport mode's quicker throttle response makes it easy to use significantly more energy per mile than Eco or Normal mode, even at the same average speed. Extra passengers and cargo add rolling resistance and, for roof-mounted cargo, aerodynamic drag; a full vehicle with a loaded roof box costs noticeably more range than a lightly loaded one.
Usable vs. Gross Battery Capacity
Manufacturers often publish a pack's gross (total) capacity, but a buffer at both the top and bottom is reserved to protect battery health — the usable capacity is what's actually available to drive on. This calculator's Battery Capacity field expects the usable figure; when our vehicle database only has a confirmed gross number, that's noted so you can adjust accordingly.