Training guides
Each section includes a short video and a downloadable guide to help you get the most out of the Calculator.
About the On-Farm Emissions Calculator
Learn what the Calculator does, how it works, and how it uses the Farm Emissions Method (FEM) to estimate your greenhouse gas emissions.
Entering your data and calculating your results
Step-by-step instructions for entering farm details — including stock numbers, fertiliser use, feed, and milk production — and running your calculation.
Creating and managing your account
How to log in, manage access, and keep your account secure. Includes tips for managing multiple farms and reports within your account.
Frequently asked questions
How do I log in?
Enter your email address and we will send you a one-time authentication code. You do not need a password. Just enter the code from your inbox to access your account.
Important: Once you request a code, stay on the login screen. Navigating away will cancel the login process and you’ll need to start again.
How do I create an account?
There is no separate sign-up process. If you have not logged in before, we will automatically create your account the first time you enter your email and authentication code.
I have forgotten my login details. What should I do?
You only need your email address to log in. We will send a fresh authentication code to your inbox whenever you request access.
Important: Stay on the login screen after requesting your code. If you leave the page, the login will be cancelled and you’ll need to re-enter your email.
I have forgotten the email address I used. What now?
Check your inboxes for past messages from no-reply@agmatters.nz. If you have received an authentication code before, it will be in that inbox. That is the email linked to your account.
I did not receive my authentication code. What should I do?
If you requested a code but have not received it, try the following:
- Check your spam or junk folder. If the email is there, mark it as “Not Spam” so future messages arrive in your inbox.
- Check for typos. Make sure you entered your email address correctly. If there is a mistake, try again with the correct address.
- Work email filters. Some work email systems block login messages. If you are using a work address, ask your IT team to whitelist no-reply@agmatters.nz.
- Wait a moment and try again. Sometimes there is a short delay. If the email does not arrive within a few minutes, resend the code.
If you are still having trouble, use the contact form and we will help you get signed in.
I accidentally created a second account. What should I do?
If you have two accounts, you can delete the one you do not need. Log in to the account you want to remove, go to Your Account (top right), scroll to the bottom, and select Delete Account.
Please note:
- Accounts cannot be merged or combined.
- Once deleted, an account cannot be recovered. Make sure you are deleting the correct one.
Can I manage more than one farm?
Yes. You can create separate reports for each farm and switch between them within your account.
What farm information do I need to get started?
You’ll need:
- Region and farm class
- Stock numbers and movements
- Fertiliser and feed use
- Milk production (for dairy farms)
Can I use estimates instead of exact figures?
Yes — estimates are fine. The more accurate your data, the more precise your results.
How long will it take to get my results?
Most calculations take about 5 to 10 seconds once your data is entered.
How is my carbon footprint calculated?
The Calculator uses the Farm Emissions Method (FEM), combining your farm data with emission factors to estimate methane and nitrous oxide emissions. Results are shown by gas type.
How is FEM different from other countries’ tools?
FEM is built for New Zealand’s pasture-based systems and is based on New Zealand’s National Inventory. It separates methane and nitrous oxide and uses local data, unlike overseas tools that often rely on global averages or regulatory frameworks.
Can I enter data for future years?
The Calculator accepts dates up to the end of the current calendar year. You can also enter data for previous years.
If you're planning a future scenario (e.g. next year’s stock numbers or feed use), simply enter the data using dates from this calendar year. The year itself isn’t material to the calculation — what matters is the month, because pasture growth and seasonal factors affect emissions.
For example, if you're modelling July next year, enter it as July this year. The results will still reflect the seasonal impact accurately.
What stock classes do I have?
Stock classes have been developed in partnership with industry, and reflect the most commonly used classifications by Inland Revenue, MPI and Agritech companies such as Farmax. For more information on stock classes, please refer to appendix two of MPI’s technical documentation, available on the MPI website.
How do I enter my data?
We have a handy guide on how to enter your data. Or watch a short video for step-by-step instructions.
What are some examples of supplementary feeds?
Concentrates
- Grains
- Meal
- Palm kernel expeller (PKE)
- Molasses
- Tapioca
- Bran / broll
- Soyabean hull
Conserved feeds
- Silage
- Hay
- Straw
Forage
- Fodder beet, kale, turnips, swedes, rape
- Lucerne, plantain, chicory
By-products
- Horticultural waste
What is dry matter (DM) and why does it matter?
Dry matter refers to the portion of feed that remains after all water is removed. It’s the nutrient-rich component animals actually consume, and it’s a key metric for estimating feed availability, productivity, and greenhouse gas emissions.
How do I calculate dry matter?
Refer to the NZ Grass-Fed Administrative Standards. Schedule 1 of the meat standard, and schedule 2 of the dairy standard, outlines the percentage dry matter for different feed types.