Plug-in Hybrid Calculator

This Web form estimates the cost and carbon savings achieved by the combination of a purchase of a plug-in hybrid car and simultaneous conversion of house electricity from fossil fuels to renewables. Start the calculation by changing the value in any of the boxes. Then change other input defaults to values appropriate for your situation, first using a traditionally powered car and electricity source in your location, and then for a plug-in hybrid car with renewable house electricity. Hover your mouse over the Details buttons for more information on each line. Details on default values are given here and limitations of the calculation are given here. Output values are given in red.

This calculator accompanies the article How I Bought a New Car, Saved Thousands, and Slashed My Carbon Footprint by Eric D. Feigelson, published by the Moshannon Group of the Pennsylvania Sierra Club, February 2015.

Driving pattern:

Annual distance on house electricity = miles/year Details
Annual distance on car gasoline = miles/year Details
Total annual car mileage miles/year

Annual electricity consumption kWh/year
Annual electricity cost = \$ /year
Annual CO2 emission = mt CO2/year Details

Cost per gallon gasoline \$/gallon Details
Fuel economy miles/gallon
Annual car gasoline cost = \$ /year Details   Link
Annual CO2 emission = mt CO2/year Details

Duration of car ownership (years)
Total cost for duraton of car ownership = \$   Details
Total CO2 emission for duration of car ownership = mt CO2
Details

New house electricity:

Renewable unit cost \$/kWh Details
Annual electricity cost = \$ /year
Annual CO2 emission: 0 mt CO2/year Details

New car gasoline:

Fraction of mileage using gasoline
Fuel economy (miles/gallon) Details
Annual car gasoline cost = \$ /year
Annual CO2 emission = mt CO2/year

New car electricity:

Fraction of mileage using house electricity
Conversion between electrical power and driving distance kWh/mile Details
Annual car electricity cost = \$ /year Details
Annual CO2 emission: 0 mt CO2/year Details

New house+car totals:

Total cost for duration of car ownership = \$   Details
Total CO2 emission for duration of car ownership = mt CO2   Details

Total savings:

Tax credit for chosen plug-in model = \$   Details   Link