How to Calculate Feed Conversion Ratio for Cricket Farms
The industry benchmark FCR for Acheta domesticus is 1.7 kg of feed per kg of live weight output. Best-in-class commercial operations hit 1.5. If you don't know your FCR, you don't know where you stand, and you're probably paying for feed waste that bin-level data would make visible.
FCR calculation isn't complicated. Here's the formula, what to measure, and how to use the data.
TL;DR
- The industry benchmark FCR for Acheta domesticus is 1.7 kg of feed per kg of live weight output.
- Best-in-class commercial operations hit 1.5.
- If Bin 007 runs at FCR 1.6 and Bin 023 runs at FCR 2.4, they're likely getting different conditions, temperature, feed amount, density.
- Find out why.
- A bin whose FCR was 1.7 last cycle and is now 1.9 has changed.
- Cricket's 1.7:1 compares to beef's 8:1 and pork's roughly 3:1, which is why crickets attract so much attention from a sustainability standpoint.
- Over a 5–6 week grow-out, this is 15–30 feeding entries per bin.
- In most cricket farms, the bottom 20% of bins by FCR performance account for over 60% of total feed waste.
FCR = Total Feed Input (kg) ÷ Total Live Weight Output (kg)
A FCR of 1.7 means you fed 1.7 kg of feed to produce 1 kg of live cricket biomass.
- Cricket's 1.7:1 compares to beef's 8:1 and pork's roughly 3:1, which is why crickets attract so much attention from a sustainability standpoint.
- Over a 5–6 week grow-out, this is 15–30 feeding entries per bin.
Live weight output: The weight of live crickets harvested from that bin at the end of grow-out.
- In most cricket farms, the bottom 20% of bins by FCR performance account for over 60% of total feed waste.
- No formula entry required.
Compare bins against each other. If Bin 007 runs at FCR 1.6 and Bin 023 runs at FCR 2.4, they're likely getting different conditions, temperature, feed amount, density.
- Find out why.
Track trends over time. A bin whose FCR was 1.7 last cycle and is now 1.9 has changed.
Live weight output: The weight of live crickets harvested from that bin at the end of grow-out.
- Dry weight FCR values are typically 3–4x higher because crickets are 60–70% water.
Worked Example
**Bin 007.
- In most cricket farms, the bottom 20% of bins by FCR performance account for over 60% of total feed waste.
- A farm running an average FCR of 1.9 might have 15 bins running at 1.6 and 5 bins running at 2.8.
- Find out why.
Track trends over time. A bin whose FCR was 1.7 last cycle and is now 1.9 has changed.
The FCR Formula
FCR = Total Feed Input (kg) ÷ Total Live Weight Output (kg)
A FCR of 1.7 means you fed 1.7 kg of feed to produce 1 kg of live cricket biomass. Lower is better. Cricket's 1.7:1 compares to beef's 8:1 and pork's roughly 3:1, which is why crickets attract so much attention from a sustainability standpoint.
For your farm, FCR tells you how efficiently each bin is converting feed into sellable product.
What You Need to Measure
Feed input: The total weight of feed delivered to a specific bin across its entire grow-out cycle. Measure by weight (grams or pounds), not by volume. Volume measurements vary based on how settled the feed is; weight is consistent.
Use a scale for every feeding. Log each feeding per bin: date, weight, feed type. Over a 5–6 week grow-out, this is 15–30 feeding entries per bin.
Live weight output: The weight of live crickets harvested from that bin at the end of grow-out. Weigh the harvest (in a container, then subtract container weight). This is your live weight output for FCR calculation.
Note on moisture weight: FCR is typically calculated on live weight, not dry weight. When comparing your FCR to benchmarks, confirm whether the benchmark is live weight or dry weight, they're not equivalent. Dry weight FCR values are typically 3–4x higher because crickets are 60–70% water.
Worked Example
Bin 007. Acheta domesticus, 6-week grow-out:
- Week 1: 45g feed × 3 feedings = 135g
- Week 2: 75g feed × 3 feedings = 225g
- Week 3: 110g feed × 3 feedings = 330g
- Week 4: 150g feed × 3 feedings = 450g
- Week 5: 165g feed × 3 feedings = 495g
- Week 6: 120g feed × 2 feedings = 240g
- Total feed input: 1,875g (1.875 kg)
Harvest weight: 1,050g (1.050 kg) live
FCR = 1.875 ÷ 1.050 = 1.79
This bin is slightly above the 1.7 benchmark, acceptable, but worth investigating whether a tweak to early-stage feeding frequency could bring it down.
Why Per-Bin FCR Reveals What Farm-Average FCR Hides
Most cricket farmers who start tracking FCR discover the same thing: the farm average looks mediocre, but it's covering up a small number of outlier bins.
In most cricket farms, the bottom 20% of bins by FCR performance account for over 60% of total feed waste. A farm running an average FCR of 1.9 might have 15 bins running at 1.6 and 5 bins running at 2.8.
Without per-bin data, you don't know which bins those are. With per-bin data, you can investigate and fix the outliers, and often discover a simple cause (a cold corner, a bad batch of feed, a ventilation dead spot) that's driving the variance.
How to Track FCR Per Bin
In a spreadsheet:
Create one row per bin per grow-out cycle. Columns: bin ID, start date, feed per feeding (with date), total feed input, harvest date, harvest weight, FCR (formula: total feed / harvest weight). Use a separate sheet per grow-out cycle or a rolling log with grow-out start and end dates.
In CricketOps:
Log each feeding per bin (bin ID, date, weight, type). Log harvest per bin (date, weight). FCR calculates automatically per bin and per farm. Bin-level FCR is visible in the dashboard. Outlier bins are flagged. No formula entry required.
What to Do With the Data
Compare bins against each other. If Bin 007 runs at FCR 1.6 and Bin 023 runs at FCR 2.4, they're likely getting different conditions, temperature, feed amount, density. Find out why.
Track trends over time. A bin whose FCR was 1.7 last cycle and is now 1.9 has changed. What's different? Feed quality, temperature, density, life stage timing?
Use FCR to optimize feed quantity. If your bins are consistently running above 2.0, you may be overfeeding, excess feed decomposes in the bin, increasing ammonia and reducing FCR. Scale back feed per session and see if FCR improves.
Prioritize feed-type changes by FCR impact. When you trial a new feed, compare FCR before and after. The only way to know if a feed change is working is to measure it.
Common Mistakes
Measuring volume instead of weight. A cup of cricket mash is not a consistent unit. Use a scale.
Logging farm-total feed instead of per-bin. "Fed the whole room 5 kg today" tells you nothing about which bins are performing. Per-bin logging is what makes FCR meaningful.
Not weighing harvest output. Estimated harvest by eye introduces large errors into FCR calculations. Weigh it.
Comparing live-weight FCR to dry-weight benchmarks. Most published cricket FCR studies use live weight. Confirm the basis before drawing comparisons.
FAQ
What is a good feed conversion ratio for crickets?
The industry benchmark for Acheta domesticus is 1.7 kg feed per kg live weight output. Best-in-class commercial operations achieve 1.5. If your FCR is above 2.1, there are identifiable problems in your operation, temperature, feed quality, density, or feeding frequency, that per-bin data can help you locate and fix.
How do I measure FCR for each bin separately?
Log feed weight per bin at every feeding event. Weigh harvest output per bin at harvest. FCR = total feed input divided by harvest weight. In CricketOps, this calculates automatically from your logged data. In a spreadsheet, maintain a feed log per bin with a running total and a harvest weight column with the FCR formula.
How does improving FCR affect my cricket farm profit margin?
Feed accounts for 35–45% of variable costs on most commercial cricket farms. Improving FCR from 2.1 to 1.7 reduces feed consumption by roughly 19% per unit of output. At $0.30/lb feed on a 50-bin operation producing 1,500 lbs of live crickets annually, that improvement saves approximately $85–$100 per year per bin, around $4,250–$5,000 across a 50-bin farm.
How do moisture levels in cricket feed affect colony health?
Feed that is too dry reduces palatability and may cause crickets to rely entirely on water gel sources for hydration. Feed with excess moisture molds rapidly in the warm, humid environment of a cricket bin, and moldy feed is a significant exposure route for pathogens. The practical approach is to serve fresh wet foods (fruits, vegetables) separately from dry feed, replace wet items within 24 hours, and store dry feed in a low-humidity area.
Should gut-loading feed differ from the standard production diet?
Yes. Gut-loading targets the 24-48 hours before harvest to maximize the nutritional value transferred to the end consumer of the cricket. Gut-loading diets typically emphasize specific nutrients the buyer requires -- omega-3 fatty acids, calcium, and certain vitamins are common targets. Standard production feed is optimized for growth rate and FCR, not for enriching the nutritional profile of the finished product.
What feed management practices have the biggest impact on FCR?
Two changes consistently improve FCR more than any other: matching feed protein content to the optimal range for the target species (22-25% for Acheta domesticus), and increasing feeding frequency for pinhead-stage crickets (3 times per day versus once). After these two variables, reducing feed waste by feeding to observed consumption rather than fixed quantities is the next highest-impact adjustment.
Sources
- Food and Agriculture Organization of the United Nations (FAO) -- Edible Insects: Future Prospects for Food and Feed Security
- North American Coalition for Insect Agriculture (NACIA)
- Journal of Insects as Food and Feed (Wageningen Academic Publishers)
- American Association of Feed Control Officials (AAFCO)
- University of Georgia Cooperative Extension
Get Started with CricketOps
Feed management is where your production economics are won or lost. CricketOps lets you log every feed batch, track consumption and FCR by bin, and identify exactly where your feed program is performing and where it is not. Start tracking your feed inputs in CricketOps and get the data you need to improve your cost per pound of cricket produced.