Animal Nutrition · Problem-solving calculator
Pearson Square Calculator
Estimate the two-ingredient proportions needed to reach a target nutrient concentration between a high- and low-nutrient ingredient.
- Free to use
- Runs in your browser
- Level B · Industry formula
- Last reviewed 2026-08-17
Calculator guide
What this calculator helps you solve
Estimate the two-ingredient proportions needed to reach a target nutrient concentration between a high- and low-nutrient ingredient.
Inputs explained
- High ingredient nutrient (%) — enter the value that applies to your operation or scenario.
- Low ingredient nutrient (%) — enter the value that applies to your operation or scenario.
- Target ration nutrient (%) — enter the value that applies to your operation or scenario.
- Target batch weight — enter the value that applies to your operation or scenario.
Formula and methodology
Worked example
Blending a 44% ingredient with a 9% ingredient to target 18% yields about 25.71% high-nutrient ingredient and 74.29% low-nutrient ingredient.
How to interpret the result
Pearson square is useful for a simple two-ingredient, one-nutrient blend. Real ration formulation often involves multiple nutrients, ingredient constraints, cost, digestibility, and safety limits.
What to keep in mind
- The target must lie between the two ingredient nutrient concentrations.
- All nutrient percentages must be on the same basis, such as dry matter or as-fed.
- This does not replace a complete ration formulation or professional nutrition advice.
Review approach
This calculator uses deterministic arithmetic and performs the calculation locally in your browser. It is designed to combine operational inputs into a decision-oriented result rather than return a one-line conversion.
Review standard: Level B · Industry formula. How calculator reviews work.
Frequently asked questions
What decision can this calculator support?
Pearson square is useful for a simple two-ingredient, one-nutrient blend. Real ration formulation often involves multiple nutrients, ingredient constraints, cost, digestibility, and safety limits.
How is the result calculated?
High-Ingredient Parts = Target − Low; Low-Ingredient Parts = High − Target.
Are the assumptions universal?
No. Operational, regulatory, technical, and industry assumptions vary. Use values that apply to your situation and verify professional or regulatory requirements where relevant.
Does CalculateMeasure store the values I enter?
The calculation runs in your browser and does not require sending the entered calculator values to a server to produce the result.