1. FCR
FCR = feed ÷ gain
Symbols
- FCR
- Feed conversion ratio ()
Why this formula works
Lower FCR means more efficient growth.
Unit check
Units match on both sides ✓
Worked example
- 1,800 ÷ 1,000
- = 1.8
Common mistakes
- Ignoring wasted feed.
Biology
Feed Conversion Ratio Calculator
Find how much feed is needed per unit of weight gained.
Your inputs
Change any value — everything updates instantly.
Total feed eaten.
Live weight gain.
Try an example
FCR
1.8 kg feed/kg
This means 1.8 kg of feed per kg of gain.
FCRFeed efficiency
1.8 kg feed/kg
What you are seeing
Each bar grows to show a result for your inputs.
The top bar is the main answer: 1.8 kg feed/kg.
Change feed used (now 1,800) and the bars update instantly.
Feed efficiency
55.6 %
Gain ÷ feed.
Result explanation: FCR
1.8 kg feed/kg.
Real-life comparison: With feed used 10% higher, the answer would be 1.98.
Low, normal or high? Use this as an estimate based on the stated formula.
Graph and details
How the result changes with feed used
How to read this chart: The line shows the result across a range of values. The dot marks your input.
What this calculator does
Find how much feed is needed per unit of weight gained.
What your result means
This means 1.8 kg of feed per kg of gain.
Group averages.
The formulas
Lower FCR means more efficient growth.
Working for your numbers
- 1,800 ÷ 1,000 = 1.8
This means 1.8 kg of feed per kg of gain.
Frequently asked questions
Good FCR?
Species-specific — broilers ~1.6–1.8.
Mortality?
Include dead birds' weight for accuracy.
Units?
Any, if the same.
Improve?
Health, genetics, feed quality.
Symbols and assumptions
- FCR
- Feed conversion ratio ()
- Accurate feed records.
Important limitation. Group averages.
Report a mistake or request an improvement
Tell us if a formula, unit, explanation, or result needs attention. Your message will include this calculator’s name and page.
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