Energy Carbon Footprint Calculator

A carbon footprint is a measure of how much greenhouse-gas emissions a person is responsible for, either directly or indirectly, and is one way to measure your impact on the environment.

NSTAR has created the Carbon Footprint Calculator below to help you determine your carbon footprint based on your energy use, and show you ways to reduce that footprint and your energy use.

Annual Energy Use
Below, please enter your electric, natural gas and/or oil usage for the year. You can find this information on your energy bill. The default figures represent the average energy use for NSTAR customers.

Please note, this carbon calculator is meant to provide a general understanding of home energy carbon emissions and provides estimates only.

Electricity Usage: (kWh per year)		(The average customer uses 6,000 kWh a year)
Natural Gas Usage: (therms per year)		(The average gas heating customer uses 850 therms per year)
Oil Usage: (gallons per year)		(The average oil heating customer uses 779 gallons a year)