Carbon Calculators

This calculator estimates your carbon footprint in three areas: home energy, transportation, and waste. There is a rough estimate that uses US average values and a more accurate estimate that uses your own numbers which requires specific data (utility bills, car mpg and miles driven, etc.). Can use calculator in Excel. Compares your amount to US average. Does NOT calculate air travel.

This calculator estimates your carbon footprint in three areas: household, transportation, and lifestyle. It is international in scope, compares your amount to the average in your location and to the world. Provides opportunity to purchase UN supported carbon credits (although the website describes them as offsets). It DOES include air travel, different modes of transportation, and diet.

The World Wildlife Federation has a carbon footprint calculator that includes home, food, travel, and stuff, as well as tips to reduce your score. This calculator is built for residents of the UK.

Beebom provides a list of their top five favorite carbon footprint calculators.

Carbon footprint calculations tend to vary across calculators. It might be helpful to consider using more than one calculator to see what your range of CO2 is.