EV Range Calculator
Estimate driving range from battery energy and your car's efficiency. This is simple arithmetic, not a range prediction for specific conditions.
How it works
Energy available = battery capacity × charge available ÷ 100. Range (miles) = energy available × 100 ÷ (kWh per 100 miles).
Worked example: 75 kWh × 80% = 60 kWh. At 30 kWh per 100 miles: 60 × 100 ÷ 30 = 200 miles.
Assumptions
- Use the car's usable (not gross) battery capacity if you know it.
- Efficiency stays constant. Speed, temperature, HVAC, terrain and load all change real range; EPA tests include hot and cold cycles for this reason.
- EPA label kWh/100 mi includes charging losses (energy from the wall), so using a label figure gives a somewhat lower range than the energy stored in the battery would deliver. A dashboard (battery-side) figure fits this calculator better.
Frequently asked questions
How is EV range related to battery size?
The U.S. DOE Alternative Fuels Data Center's example pairs a 200-mile range with a fully depleted 54 kWh battery, which is 27 kWh per 100 miles. Range = kWh × 100 ÷ kWh per 100 miles.
Why does my range change in winter?
EPA's EV test program includes a cold test at 20°F with heating and a hot test at 95°F with air conditioning because temperature and climate control change energy use.
Related calculators
- MPGe, kWh/100 mi and miles/kWh converter
- EV charging time calculator
- kWh to miles converter
- Cost to charge an EV battery from X% to Y%
- Amp-hours to kWh battery calculator
- kWh/100 km, Wh/mi and MPGe converter
Sources
Formulas and reference values are from these sources. Page last reviewed 2026-10-19.