There are plenty of carbon calculators available online, which vary significantly in their usefulness and the parameters they measure.

Our new carbon calculator is the first in a series of tools we're producing to illustrate the issues around carbon emissions and climate change.

The carbon calculator gives you ideas and advice about how to reduce carbon.

Looking for an easier way to make her life greener, she tried a "carbon calculator" at the Web site of the Conservation Fund (conservationfund.org).

Find carbon calculators on the Carbon Trust website - Opens in a new window.

In this article, we'll learn how carbon calculators come up with your personal total, what it means and how to reduce your carbon footprint.

National carbon calculator: Can you cut UK emissions?

For individuals, carbon calculators simplify compiling an inventory.

The program is designed to help individuals take action to reduce their carbon footprints and includes a custom-built carbon calculator.

The Guardian's carbon calculator - the Lib Dems were the only major party to fill it out.