We calculate the daily CO2 emissions for your EV utilizing a combination of official U.S. government data on emissions, odometer readings from your vehicle, and fuel economy data specific to your vehicle model.

Miles Driven: This comes from your vehicle's odometer readings.

Electricity Consumption (kWh): Based on your miles driven and the energy efficiency of your vehicle (miles per kWh), we estimate the electricity consumed in kilowatt-hours (kWh)

Electricity Emissions: We calculate the emissions associated with electricity consumption, based on the carbon intensity of your local energy grid. Essentially, this is how ‘clean’ or ‘dirty’ the energy production is in your area.

Comparison Vehicle: For comparison purposes, we identify an equivalent gas-powered vehicle based on attributes such as size, class, or average MPG. In the future, we hope to offer the ability to customize the comparison vehicle.

Comparison Vehicle Emissions: We calculate the emissions that the comparison vehicle would produce for the same miles driven. We use standard emissions factors that look at the carbon content of gasoline and the average efficiency of the comparison vehicle.

Emissions Reduction: We calculate the difference between the emissions of the comparison vehicle against your vehicle for the same miles driven. This shows a direct measure of the environmental benefits of driving an EV versus a traditional gas-powered vehicle.