Feed Conversion Ratio Calculator

Work out feed conversion ratio instantly with clear inputs, formula shown and shareable results.

About Feed Conversion Ratio Calculator

Divides feed consumed by live weight gain and converts the ratio into feed cost per kilogram of gain.

Formula

Feed conversion ratio

FCR = feed consumed / weight gain; feed efficiency is its reciprocal; feed cost per kg gain = FCR x feed price

Worked example

With the default values below, Feed Conversion Ratio Calculator returns Feed conversion ratio of 2.0000. Change any input above and every figure here is recalculated in your browser.

Inputs used

Feed consumedaccepts 0.1–1,000,000 kg: 300 kg
Live weight gainaccepts 0.01–1,000,000 kg: 150 kg
Feed price per kilogramaccepts 0.01–100: 0.4

Results

Feed conversion ratio: 2.0000
Feed efficiency: 50.000%
Feed cost per kilogram of gain: $0.8000
Total feed cost: $120.00

Step by step

1Values used
2Feed conversion ratio
3Feed conversion ratio= 2.0000
4Feed efficiency= 50.000
5Feed cost per kilogram of gain= 0.8000
6Total feed cost= 120.00

Assumptions and limits

The result is derived only from the 3 inputs listed above. Anything not among them is not part of the calculation.
In particular, this calculator does not take inflation, tax or compounding frequency into account.
Figures are rounded for display to 4 decimal places, so totals built from several rounded parts can differ slightly from the unrounded arithmetic.

How these calculators are built and tested is described on the Methodology page. If a figure looks wrong, please report it.

Frequently Asked Questions

What FCR is typical?

About 1.5 to 1.7 for broilers, 2.7 to 3.0 for pigs and 6 or more for beef cattle.

Should FCR use live or carcass weight?

Live weight is conventional; carcass-based ratios are higher and must be labelled as such.