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



Traditional house electricity:

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

Traditional car gasoline:

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

Traditional house+car totals:

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

Cost savings over duration of car ownership, including tax credit = $   Details

CO2 savings over duration of car ownership = mt CO2 or % of the original carbon emission.   Details