This CO2 calculator has been custom designed to accompany Low Carbon Diet.

In order to fill it out accurately you will need to have the following information:

  1. Your last few payment statements from your electricity, natural gas and/or heating oil providers.
  2. The average weekly or annual miles driven in each of your household's cars.
  3. The mpg of all your household's cars. If you need help calculating this, see page 17 of the Low Carbon Diet workbook.
  4. The amount of airplane miles traveled per year. Click here to calculate distances between airports.

Please Note: Calculator totals household usage, not individual usage. If you would like to know your personal calculation, simply divide the final total by number of persons in your household.

Calculate Your Household's Carbon Dioxide (CO2) Emissions

If you are currently on a Low Carbon Diet team, please fill out the Calculator below, print out a copy, and bring it to your Team Building meeting. Note: If you close down your computer before printing your answers, you will lose all your data and have to begin again. It is best to set your browser options to not print background colors and images (or you may use a lot of colored ink).


Javascript must be enabled in your browser preferences. You must use the tab key on your keyboard to tab through each field below in order for the totals to accumulate at the end. Please enter data into the middle column fields and leave a zero if that field does not apply to you.

Please answer the questions below. If any questions do not pertain to your household, simply leave them blank. Enter your data CO2 emissions per year in Lbs.
How many gallons of garbage do you put out each week?
An average garbage can holds 32 gallons.
On average, what is your household kWh usage per year?
On average, how many therms of natural gas do you use per year?
On average, how many gallons of propane do you use each year?
On average, how many gallons of fuel oil do you use per year?
On average, how many miles do you put on your primary car?
300 miles/week or 15,000 miles/year is about average in the United States

Per Week
Per Year
If you have a second car, enter the number of miles you drive
Per Week
Per Year
If you have a third car, enter the number of miles you drive
Per Week
Per Year
What is the average gas mileage for your primary car?
If you're unsure, assume your car gets 22 miles per gallon, which is about average.
What is the average gas mileage for your second car?
What is the average gas mileage for your third car?
Estimate the average number of miles that your household travels by air each year
Your Total Emissions
Typical CO2 output per household per year United States
Based on your current lifestyle practices you are at level out of 10 levels (10 is the best).
My goal is to reduce my annual CO2 emissions by pounds.
If I reach my goal, I will be at level .

Sources used for the calculations are as follows:

US Dept. of Energy, Energy Information Administration

US Dept. of Energy, EIA, Office of Integrated Analysis and Forecasting

US Environmental Protection Agency