Poultry • productionVerified Scientific Formula
Broiler Feed Conversion Ratio (FCR) Calculator
Calculates the Feed Conversion Ratio (FCR), feed efficiency percentage, and feed cost per unit of live gain for broiler chickens and meat birds.
Enter Parameters
Calculated Output
Feed Conversion Ratio
1.574FCR63.5% Feed Efficiency
What This Result Means
This flock required 1.574 lbs of feed to produce 1.0 lbs of live weight gain (63.5% feed efficiency). Excellent feed efficiency meeting modern commercial standards.
Calculation Details & Practical Equivalents
Feed Conversion Ratio (FCR)
1.574
Feed Efficiency Percentage
63.5%
Feed Cost per lbs Live Gain
$0.331
Total Feed Consumed
85,000 lbs
Total Live Gain
54,000 lbs
Formula & Mathematical Methodology
Standard Mathematical Formula
FCR = Total Feed Consumed (kg or lbs) ÷ Total Live Weight Gain (kg or lbs) | Feed Efficiency % = (1 ÷ FCR) × 100
Formula Variables Defined
FeedTotal Feed Consumed(lbs or kg)
Total feed fed to flock over production cycle
GainTotal Live Weight Gain(lbs or kg)
Total live mass gained by flock
Step-by-Step Calculation Example
Example: 10,000 Bird Commercial Broiler Flock
A flock consuming 84,875 lbs of feed and producing 54,013 lbs of live weight gain.
- FCR = 84,875 lbs ÷ 54,013 lbs = 1.571
- Feed Efficiency = (1 ÷ 1.571) × 100 = 63.6%
Final Output: 1.571 FCR (63.6% Feed Efficiency)
Key Assumptions
- Feed consumed and weight gain are measured for the exact same flock.
Biological Limitations
Verified Scientific & Veterinary Sources
Version: 1.0•Methodology Reviewed: 2026-01-20
1. Ross 308 Broiler Performance Objectives & Nutrition Specificationsindustry-standard
Aviagen Technical Services (2022). Aviagen Broiler Management Guide
Access Source Authority 2. Poultry Development Review: Production Performance Standards & Efficiency Metricsgovernment
Food and Agriculture Organization (FAO) of the United Nations (2018). FAO Animal Production and Health Guidelines
Access Source Authority Broiler Feed Conversion Ratio (FCR) Calculator — FAQs
Modern commercial broiler strains typically achieve an FCR between 1.45 and 1.65 depending on harvest age and target weight.
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