Livestock Feed Conversion Ratio (FCR

Feed Conversion Ratio (FCR) measures the efficiency with which livestock convert feed mass into desired body weight gain. A lower FCR indicates higher agricultural efficiency.

To use the Livestock Feed Conversion Ratio (FCR) & Efficiency Calculator, enter your Total Feed Consumed, Total Live Weight Gain, Livestock / Animal Category. The calculator instantly computes Feed Conversion Ratio (FCR), Feed Efficiency Rate (FE) and more. Results update in real time as you change any input — no submit button needed.

How to Use This Calculator

Enter your Total Feed Consumed (e.g. 350 in lbs), Total Live Weight Gain (e.g. 200 in lbs), and Livestock / Animal Category — choose from Farmed Salmon / Fish (Benchmark FCR ~1.2), Broiler Poultry / Chickens (Benchmark FCR ~1.6 - 1.8), Swine / Pigs (Benchmark FCR ~2.8 - 3.2). Results update instantly as you type — adjust any value to compare scenarios.

The Formula

Feed Conversion Ratio (FCR) = Total Feed Consumed ÷ Total Weight Gain

Feed Efficiency % (FE) = (Total Weight Gain ÷ Total Feed Consumed) × 100

Worked Example

350 lbs of feed consumed yielding 200 lbs live weight gain in broiler poultry:

FCR = 350 / 200 = 1.75 lbs feed per lb gain.

Feed Efficiency FE = 100 = 57.1% (EXCELLENT FEED EFFICIENCY).

Understanding Your Result

Percentages are relative values — context determines what is "good" or "bad." A 50% discount is significant; a 50% failure rate is alarming. Percentage change and percentage points are different: moving from 4% to 5% is a 1 percentage point increase, but a 25% relative increase. When comparing percentages across different base values, always check whether absolute differences are meaningful — a 10% improvement on a large base creates more absolute value than 10% on a small base.