Nutrient Unit Calculator (Ontario)
Estimate the total nutrient units (NU) for your farm based on your livestock inventory.
Livestock #1
Estimated NU
0.0
TOTAL ESTIMATED NUTRIENT UNITS
0.0 NU
This calculator is a planning tool only. Final nutrient unit calculations should be confirmed as part of a formal nutrient management review.
What Are Nutrient Units?
A nutrient unit is a standardized measurement used under Ontario's Nutrient Management Act to determine the regulatory requirements for your farm. One nutrient unit is the amount of nutrients that would be generated by the equivalent of one 455 kg (1,000 lb) beef animal.
Example Livestock Conversions
Livestock Type
Approx. Animals per Nutrient Unit
Dairy Cow
~1 cow
Beef Feeder
~2.5 animals
Sow (farrow-to-finish)
~3 sows
Broiler Chickens
~300 birds
Laying Hens
~150 birds
Turkeys
~150 birds
Note: These are approximations. Actual nutrient unit calculations depend on specific animal weights, housing types, and management practices.
The 5 Nutrient Unit Threshold
At 5 nutrient units or more, your farm will typically require a Nutrient Management Strategy (NMS).
Not Sure About Your Nutrient Units?
We can calculate this for you as part of a free consultation.
Use the Tools
Can I Build a Barn Here?
Check whether a proposed barn location may be constrained by MDS, setbacks, or nearby land uses.
Use the Advanced MDS Calculator
Estimate detailed MDS-related setback planning for livestock barns and manure storage.
Frequently Asked Questions
Do I need an NMS to build a barn in Ontario?
What are nutrient units and how does this relate to livestock?
When do I need both an NMS and an NMP?
How long does approval of a NMS or NMP take?