About the Feed Conversion Ratio Calculator
Feed conversion ratio from feed consumed and weight gained, with the cost of gain.
Also known as: fcr calculator, feed efficiency, feed to gain ratio, livestock efficiency.
How to use this calculator
- Enter feed consumed, starting weight, finishing weight, number of animals and the other fields.
- The result updates instantly as you type — press Calculate (or Enter) at any time.
- Review the breakdown shown under the main result.
- Use Copy result or Share to save the answer or send a link with your inputs.
Formula
FCR = feed consumed ÷ weight gained
Worked example
Using the values pre-filled in the calculator above:
- Feed consumed = 1,200 kg
- Starting weight = 250 kg
- Finishing weight = 600 kg
- Number of animals = 1
- Feed price per kg = 0.26
the calculator returns:
- Feed conversion ratio: 3.429 : 1
- Weight gained: 350 kg
- Feed per animal: 1,200 kg
- Feed efficiency: 0.2917 kg gain per kg feed