EVCalc
Charging time, cost per charge, range impact from temperature and speed, battery health, and home charger payback. The numbers behind going electric.
Charging Time Calculator
Calculate how long it takes to charge from any % to any % at a given power level.
Charging Cost Calculator
Calculate the cost to charge your EV at home or at a public station.
Range Impact Calculator
See how temperature, speed, and HVAC affect your EV's real-world range.
Battery Degradation Estimator
Estimate battery capacity remaining after years of use.
Home Charger ROI Calculator
Calculate payback period for installing a Level 2 home charger.
About EVCalc
EVCalc helps EV owners and prospective buyers understand the real costs and performance of electric vehicles. Calculate charging times and costs, see how temperature and speed affect range, estimate battery degradation, and figure out if a home charger pays for itself.
All tools run in your browser with no data leaving your device. Share calculations via URL.
Range estimation: EV range depends on usable battery capacity (kWh) and energy consumption (kWh/mile). Range = usable capacity / consumption. A 75 kWh usable battery at 3.5 miles/kWh delivers approximately 262 miles of range. Consumption varies with speed (highway driving at 70+ mph uses 30–50% more energy than 55 mph), temperature (battery capacity drops 20–40% at 0°F versus 70°F), HVAC load, and driving style. EPA range ratings use a standardized cycle; real-world range often matches EPA rating within ±10% in moderate conditions.
Charging speed: Level 1 (120V/12A) adds approximately 1.3–1.5 kWh/hour = 4–5 miles/hour — useful only for low-mileage drivers. Level 2 (240V/32–48A) adds 7.2–11.5 kWh/hour = 25–40 miles/hour — the standard home charging solution. DC Fast Charging (DCFC) peaks at 50–350 kW depending on the vehicle's maximum AC charge rate: 150 kW for many Model 3/Y, 250 kW for Model S Plaid, up to 350 kW for Ioniq 6/Taycan. DCFC slows significantly above 80% state of charge to protect battery cells.
Cost per mile: electricity cost ($/kWh) × consumption (kWh/mile) = $/mile. At $0.15/kWh average residential rate and 3.5 miles/kWh: 0.15/3.5 = $0.043/mile. Compared to a 30 MPG gasoline car at $3.50/gallon: $3.50/30 = $0.117/mile. EVs typically cost 60–70% less per mile for fuel. Home charging (off-peak TOU rates) can reduce cost to $0.025–0.035/mile in many utility territories.
Battery degradation: lithium-ion cells lose capacity gradually with charge cycles and time. Most EV batteries retain 80% of rated capacity after 100,000–150,000 miles under normal use. Degradation is accelerated by frequent DCFC sessions, charging to 100% regularly, and extreme temperatures. Most manufacturers recommend charging to 80% for daily use and reserving 100% charge for long trips — many vehicles have a "daily charge limit" setting for this purpose.