Biomass Gain in FCR: Record Removals and Mortality Before Comparing Batches; illustrative quantitative diagram
Make a controlled comparison
The biomass denominator needs a consistent accounting method. Animals entering or leaving the group, mortality and changes in inventory can alter a simple end-minus-start calculation. Follow the relevant reporting convention before entering the gain; this tool does not reconstruct missing stock or production records.
Feed Conversion Ratio Calculator makes the stated relationship reproducible. It cannot supply missing product information, identify a representative sample or establish a suitable site-specific management decision.
Change one input at a time
The table varies Feed actually consumed during period (kg) around the illustrative starting value while retaining the other assumptions. These are sensitivity scenarios, not a measured range or recommended settings.
| Feed actually consumed during period (kg) | Selected calculated output | Unit |
|---|---|---|
| 160 | 1.6 | kg feed per kg gain |
| 200 | 2 | kg feed per kg gain |
| 240 | 2.4 | kg feed per kg gain |
Browse Biology calculators and its Livestock calculators section when another measurement is needed. A related tool may use a different denominator or physical basis.
Keep the interpretation within scope
Keep Feed actually consumed during period (kg) with the selected output in the comparison record. The three alternatives do not identify which input applies to a particular site or product. A justified new observation should be recorded as new evidence, rather than choosing an input merely because its result looks convenient.
A related quantity
Dry Matter Calculator addresses a related part of the task. Check its own input definition before carrying a number across.
Continue with Feed Conversion Records: As-Fed and Dry-Matter Inputs Cannot Be Mixed for the other part of this measurement question.
Return to GreenCalc for other subjects. Keep raw observations, chosen assumptions and calculated quantities identifiable so a later revision does not overwrite the basis of the original record.
By GreenCalc · Updated 2026-11-06