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Livestock, Poultry & Aquaculture
Feed Conversion Ratio Calculator
Calculate feed conversion ratio (FCR), live-weight gain, feed efficiency and feed cost per unit of gain.
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How to use the Feed Conversion Ratio Calculator
- Enter Total feed consumed (kg).
- Enter Initial total live weight (kg).
- Enter Final total live weight (kg).
- Enter Feed cost (per kg) if applicable. Optional cost result.
- Keep every value in the unit shown beside its field.
- Select Calculate and review each result and assumption.
- Verify important decisions with local records, labels, extension guidance, or a qualified adviser.
Formula and method
FCR = total feed consumed ÷ total live-weight gain.
Live-weight gain is final minus initial group weight. Lower FCR means less feed was used per unit of gain.
Worked example
Using 5,000 kg feed for 2,500 kg live-weight gain produces an FCR of 2.0.
Understanding the result
Treat the calculated values as a planning estimate. Compare them with your field records, product information, local conditions and operational capacity before acting.
Important: Results depend on the accuracy of your inputs and the assumptions shown. Local soil, weather, crop, animal and market conditions can change the appropriate decision.
Subject review: Dr. Abdullah, Veterinary Surgeon. Reviewed the livestock and husbandry assumptions. Software and calculator implementation: BlogAgri.
Frequently asked questions
How is feed conversion ratio calculated?
Divide total feed consumed by total live-weight gain over the same period. Final live weight must be greater than initial live weight.
What does an FCR of 2.0 mean?
An FCR of 2.0 means 2 kg of feed was consumed for each 1 kg of live-weight gain.
Is a lower FCR always better?
A lower FCR indicates less feed per unit of gain, but comparisons should use similar species, age, production stage, diet, environment and measurement methods.
Does feed price change FCR?
No. Feed price does not change the biological FCR, but it changes feed cost per unit of gain.