EV Range Estimator
Estimate your electric vehicle's range based on battery capacity, efficiency, charge level, and outside temperature.
Energy Available-- kWh
Range at Current Charge--
Range at 100% Charge--
Temp-Adjusted Range--
Efficiency--
About EV Range
EV range depends on battery capacity, driving efficiency, charge level, and environmental factors. Cold weather significantly reduces range — at -20°C, expect up to 30% less range due to battery chemistry, cabin heating, and increased tire resistance. Hot weather above 35°C has a smaller effect (5-10%), mainly from AC usage. Efficiency is typically rated in Wh/mi or Wh/km — lower values mean more efficient driving and longer range.
FAQ
What is Wh/mi vs mi/kWh?
Wh/mi (watt-hours per mile) measures energy consumed per mile — lower is better. mi/kWh measures miles driven per kilowatt-hour — higher is better. To convert: mi/kWh = 1000 / Wh/mi. Typical EVs range from 250-350 Wh/mi (2.9-4.0 mi/kWh).
How much does cold weather affect range?
At 0°C (32°F), expect about 15-20% range loss. At -20°C (-4°F), range can drop 25-35%. This is caused by reduced battery chemical reactions, cabin heating load, and increased rolling resistance from cold tires. Using a heat pump (vs resistive heater) and preconditioning while plugged in can reduce the impact.
Does fast charging affect range?
Fast charging itself doesn't reduce range, but frequent fast charging can slightly degrade battery health over time, which reduces maximum capacity. Most manufacturers recommend keeping charge between 20-80% for daily use and only charging to 100% for long trips.
What affects EV efficiency the most?
Speed is the biggest factor — highway driving at 70+ mph can use 30-40% more energy than city driving at 30 mph due to aerodynamic drag. Other factors include tire pressure, climate control, elevation changes, payload, and driving style (aggressive acceleration vs smooth driving).