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EV Range Calculator

Estimate electric vehicle driving range from battery capacity, efficiency, state of charge, weather, and driving conditions.

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Inputs that matter
Battery Capacity, Usable Battery %, Efficiency, State of Charge, and 2 more
Output to expect
EV Range Calculator
  • Check the units and required inputs before comparing results.
  • Keep the assumptions with a copied result so you can reproduce the calculation later.
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Reference & details

How it works

Base Range Formula

Range equals usable energy multiplied by vehicle efficiency (miles per kWh).

Range (mi) = Usable kWh × mi/kWh

Usable Battery Capacity

Manufacturers reserve 5–10% of gross battery capacity as a buffer. State of charge further limits available energy.

Usable kWh = Capacity × Usable% × SOC%

Weather and Driving Adjustments

Cold weather (battery heating, cabin heat) can reduce range 20–30%. Highway speeds above 70 mph and A/C use also lower efficiency.

Adjusted Range = Base Range × Weather Factor × Driving Factor

Updated: July 2026

Example Scenarios

Typical modern EV with 90% usable capacity and 3.5 mi/kWh efficiency.

Battery: 75 kWhEfficiency: 3.5 mi/kWhWeather: Mild

→ ~236 miles estimated range

Same vehicle in sub-freezing conditions with heat on.

Weather: Cold (<32°F)

→ Range reduced ~25–30% vs mild conditions

Fast-charging to 80% SOC then highway driving.

SOC: 80%Driving: Highway

→ Lower range than EPA rating due to speed and partial charge

Common Mistakes to Avoid

Using gross battery capacity instead of usable energy

EPA range ratings account for usable capacity. A "75 kWh" pack may only have ~67–72 kWh usable.

Expecting EPA range in winter or at 75 mph

EPA tests combine city/highway cycles at moderate temperatures. Real-world highway winter range is often 20–40% lower.

FAQ

Range = usable battery energy (kWh) × efficiency (mi/kWh), adjusted for weather and driving conditions.

Battery chemistry is less efficient in cold, and energy is used to heat the cabin and battery pack.

Most EVs achieve 2.5–4.5 mi/kWh (22–40 kWh/100mi). Smaller, lighter cars tend toward the higher end.

Aerodynamic drag increases with speed. Sustained 70+ mph driving typically reduces range 10–20% vs mixed driving.

Daily charging to 80–90% preserves battery health. Use 100% only when you need maximum range for a long trip.

About EV Range Calculator

Calculate how far your electric vehicle can travel on a charge. Enter battery size, efficiency, state of charge, and weather to estimate real-world range beyond the EPA sticker rating.