CoolClimate Network: Mobile Footprint Calculator Smart tools for a cooler planet (A University – Government – Business – NGO Partnership at the University of California, Berkeley) Find out how your household contributes to greenhouse gas emissions, and discover some of the ways you can reduce your carbon footprint.
EPA Household Carbon Footprint Calculator (An excellent, in-depth calculator that takes about 15-20 minutes to complete. Issues covered include home energy use, household vehicle use, recycling and more.)
Native Energy Carbon Calculators (Business, Household, Travel)
Corporate Carbon Footprint Calculator from carbon footprint (TM)