Feed conversion ratio (FCR) is the most important economic metric in poultry production — it measures how efficiently birds convert feed into meat or eggs. Lower FCR means better efficiency and higher profitability. This calculator computes your flock's FCR and compares it to industry benchmarks to identify improvement potential.
Flock Performance
For broilers: total live weight at processing − starting chick weight × number of birds
FCR Analysis
Industry FCR Benchmarks
| Type | Excellent | Good | Average | Poor |
|---|---|---|---|---|
| Broilers | <1.75 | 1.75–1.85 | 1.85–2.0 | >2.0 |
| Layers (lbs feed/doz eggs) | <4.0 | 4.0–4.5 | 4.5–5.0 | >5.0 |
| Turkeys (tom) | <2.5 | 2.5–2.7 | 2.7–3.0 | >3.0 |
| Ducks (meat) | <2.2 | 2.2–2.5 | 2.5–2.8 | >2.8 |
How to Calculate and Improve Poultry Feed Conversion Ratio
Feed conversion ratio is calculated as total feed consumed divided by total weight gained (for meat birds) or total egg mass produced (for layers). Lower is better — an FCR of 1.8 means 1.8 lbs of feed produces 1 lb of gain.
How to Calculate FCR
For broilers: FCR = total feed consumed ÷ total live weight gained. For 5,000 birds consuming 27,500 lbs of feed and reaching an average 5.5 lb live weight (from 0.1 lb chick weight): total gain = (5.5 - 0.1) × 5,000 = 27,000 lbs gain. FCR = 27,500 ÷ 27,000 = 1.02... Wait — that can't be right. Actual example: 5,000 birds, 5.5 lb average, consuming 47,250 lbs feed: FCR = 47,250 ÷ 27,000 = 1.75.
Corrected FCR (Mortality-Adjusted)
If birds die during the grow-out, their feed consumption was waste relative to saleable weight. Corrected FCR = total feed ÷ (number of birds sold × average live weight). High mortality flock that loses 5% of birds with average FCR of 1.8 may have corrected FCR of 1.92 — important for accurate profitability tracking.
Improving FCR on Small Flocks
Key improvements: (1) Feed quality — ensure complete balanced ration with correct amino acid profile. (2) Temperature management — cold birds eat more for maintenance, hot birds eat less and grow slower. Optimal house temp for broilers: 70-75°F by week 3. (3) Water access — birds need 2× more water than feed by weight. Restricted water access raises FCR by 0.2-0.5. (4) Disease prevention — even subclinical coccidiosis adds 0.2 to FCR.
Frequently Asked Questions
Is this FCR calculator free?
Yes, completely free with no signup required.
What is a good FCR for broilers?
Modern commercial broiler flocks achieve FCR of 1.7-1.9 (lbs feed per lb live weight gain). High-performance integrations can achieve 1.6-1.7. Backyard and small-scale operations typically run 2.0-2.5. FCR improves with faster-growing genetics, better feed quality, optimal house temperature, and disease-free flocks.
How is FCR calculated for layer hens?
Layer FCR is measured differently than broiler FCR. Common metrics: (1) lbs feed per dozen eggs — target 4.0-4.5 lbs/dozen, (2) grams feed per gram egg — target 2.0-2.5, or (3) feed per hen per day (110-130g/day at peak production). Egg mass (total weight of eggs produced) is often the best performance metric.
What causes poor FCR in broilers?
Key FCR factors: genetics (fast vs slow-growing breeds), feed quality (amino acid balance, energy density), disease (coccidiosis, necrotic enteritis add 0.1-0.3 to FCR), temperature (cold stress increases maintenance energy), feeder/waterer management (poor access = wasted energy), and stocking density (overcrowding >0.9 sq ft/bird at processing weight).
What is the economic value of improving FCR by 0.1?
Improving FCR by 0.1 on a 50,000-bird broiler flock with 5.5 lb market weight reduces feed consumption by 27,500 lbs per flock. At $250/ton feed cost, that is $3,437 per flock savings. Over 6 flocks/year, $20,625 annual savings per house — a powerful reason to track and optimize FCR.