Work out your farm’s greenhouse gas emissions from stock, feed and fertiliser inputs

This calculator will step you through providing details about your farm, stock and stock movements, and the fertiliser and feed used in your financial year. It uses this information to estimate your farm’s greenhouse gas emissions.

It uses the Ministry for Primary Industries' Farm Emissions Method (FEM).

The calculator presents your emissions on a split-gas basis - providing details on your methane and nitrous oxide emissions by source.

This calculator is not a regulatory tool. Any data provided is not accessible to the Ministry for Primary Industries or other government departments.

This calculator is for anyone farming sheep, beef, dairy or deer in New Zealand.

It has been designed for farmers wanting to understand and reduce their on-farm emissions.

To get an accurate result, you’ll need to provide the following details about your farm(s):

• Region and farm class
• What nitrogen fertilisers you’ve used (or are planning to use)
• Stock numbers and classes, including actual or anticipated movements, deaths, and births
• What feed you've used (or are planning to use)
• Milk production details (dairy farms only)

Learn more about how the calculation works

The New Zealand Institute for Bioeconomy Science (BSI) has developed this web calculator, supported by funding from the Ministry for Primary Industries (MPI), to help farmers calculate their emissions using the MPI standardised method of calculation. The method was developed with assistance from a technical advisory group and sector input.

Any information you provide is private and is not shared unless you choose to do so.

Read our data privacy statement

We’ve put together user guides and walkthrough videos plus answers to frequently asked questions.