Charging Cost Calculator

EV & Utility Inputs

Battery Size (kWh) Usable battery capacity

EPA Rated Range (Miles) Full charge range

Daily Commute / Driving (Miles)

Home Electricity Rate ($/kWh)

Public Charging Rate ($/kWh)

DC Fast Charging % of Sessions

Charging Efficiency Loss (%) Heat/conversion loss (default 10%)

Gas Vehicle Baseline (MPG)

Gasoline Price ($/gallon)

Charging Formulas & Grid Mechanics

Energy Efficiency Factor: Derived as Usable Battery kWh / Rated Range Miles. A 75 kWh battery with 280 miles range yields 0.268 kWh/mile (or 26.8 kWh/100 miles).
Home Charging Cost: (Daily Miles × kWh/mile × (1 + Efficiency Loss)) × Home Rate.
Public DC Fast Cost: (Daily Miles × kWh/mile × (1 + Efficiency Loss)) × Public Rate.
Level 1 Charge Rate: 120V @ 12A (1.44 kW gross / ~1.2 kW net to battery). Takes approx. 50-60 hours for a 0-100% full charge.
Level 2 Charge Rate: 240V @ 40A (9.6 kW gross / ~8.6 kW net to battery). Takes approx. 7-9 hours for a 0-100% full charge.
DC Fast Charging Rate: 150 kW peak DC charger. 10% to 80% charge takes approx. 25-35 minutes depending on battery thermal curve.
CO2 Emissions Note: Environmental footprint depends on regional grid mix (hydro, nuclear, renewables vs. coal/natural gas). On average U.S. grid mix, an EV produces ~70% fewer operational carbon emissions than an equivalent gasoline vehicle.