Catalyst has developed two carbon calculators - the ACE Carbon Calculator and the Marine Freight calculator. Each is free to use, just click on the links in the Tool Box on the right to be taken to them.

ACE was designed to help you estimate the greenhouse gas (GHG) emissions arising from your household or business activity, working on the theory that "you cannot manage what you cannot measure".

Once you have measured your emissions you are in a strong position to manage them through reducing them where you can and offsetting some or all of the remainder. There are a number of ways to reduce emissions.

New Zealand and Australian versions are available. Please ensure you download the version relevant to you. This is important as different data is used in each country.

Activities for input into ACE include:

Who is using ACE?

Over 600 individuals or companies have used ACE in the past five years to measure and manage their GHG emissions. Users include:

• AgFirst Bay of Plenty Ltd - independent horticulture consultancy and service provider
• The Sustainable Business Network - a national forum and assistance provider for businesses interested in sustainable development practices
• Quattro Enterprises - Auckland based IT solutions provider
• Scion - New Zealand's Crown Research Institute providing science expertise for biomaterials development and the forestry sector
• Warren Forestry Ltd - South Island company managing multi-site, multi-species joint venture forestry investments
• Landscape Design Company - 2009 winners of the Sustainable Business Network Award for trailblazing small to medium sized business in the Bay of Plenty

For more information on ACE click here.