Pearson Square Feed Calculator

The Pearson Square Feed Calculator estimates precise feed mixture amounts based on nutrient content percentages and desired levels. This tool helps farmers and livestock owners create balanced rations efficiently without manual math errors. Whether you are mixing poultry starter, balancing dairy cow protein, or formulating swine finisher feed, this tool ensures estimated results. Achieve optimal animal health and growth by using the reliable Pearson Square method today.

Enter the percentage of the target nutrient in Feed A (e.g., protein, fat, fiber)
Enter the percentage of the target nutrient in Feed B
Enter the target nutrient percentage you want in the final mix
Enter the total amount of feed mixture needed (in lbs, kg, tons, etc.)

How Feed Mixture Amounts Is Calculated

Feed mixture amounts represent the estimated weights of two ingredients needed to reach a specific nutrient target. This calculation uses the Pearson Square method, a simple algebraic technique that balances the difference between ingredient values.

Part of Feed A = |Value of Feed B – Desired Value|
Part of Feed B = |Value of Feed A – Desired Value|

Where:

  • The absolute value aims to ensure the numbers are positive for the ratio.
  1. Subtract the nutrient value of Feed B from the Desired level to find the parts for Feed A.
  2. Subtract the nutrient value of Feed A from the Desired level to find the parts for Feed B.
  3. Add the parts together to get the total, then divide each part by the total to get the percentage.
  4. Multiply these percentages by your Total Mix Amount to find the physical weight.

This cross-subtraction method works because it mathematically cancels out the surplus and deficit of nutrients, resulting in a precise mixture.

What Your Feed Mixture Amounts Means

Your Calculation show the specific physical weight of each ingredient required to meet your livestock's nutritional needs. Understanding these ratios provides information to help manage costs and animal health effectively.

High-Protein Formulas: If the calculator assigns a large percentage (e.g., over 60%) to the high-protein ingredient, you are likely supporting young, nursing, or lactating animals. These animals require elevated nutrient levels (often 16-20% protein) to support rapid growth and milk production.

Maintenance or Finishing Diets: If the mix leans heavily toward the energy source (e.g., 80% corn or grain), the goal is maintenance or fattening. This provides high calories for weight gain without the cost of excess protein.

Balanced Rations: A result near a 50:50 ratio typically indicates you are balancing two ingredients with moderate nutrient differences, often used for general herd health.

Related Calculators

Calculation logic verified using publicly available standards.

View our Accuracy & Reliability Framework →