Cricket Feed Conversion Ratio: Benchmarks, Feed Formulations, and Waste Reduction

FCR: The Most Important Number in Your Operation

Feed conversion ratio (FCR) is the most important production metric in any livestock system, and cricket farming is no exception. FCR tells you how many pounds of feed are required to produce one pound of live cricket. At typical wholesale prices, the difference between an FCR of 2.0 and an FCR of 2.8 can be the difference between a profitable batch and a break-even one.

Unlike poultry or swine where FCR benchmarks are well-established after decades of research, cricket FCR data is still being refined as the industry matures. The ranges provided here reflect practical experience from operating commercial Acheta domesticus farms under North American conditions, not theoretical models.

FCR Benchmarks for Acheta Domesticus

Live-weight FCR (feed weight divided by live harvest weight): well-managed operations targeting 88F consistently typically achieve 1.8 to 2.4. Operations with temperature inconsistency, poor water access, or suboptimal feed typically run 2.5 to 3.5 or higher. Anything above 3.5 on a live-weight basis indicates a significant management problem.

Dry-weight FCR (often cited in scientific literature): if you compare dry feed weight to dry cricket weight, you typically see 1.7 to 2.0 for well-managed operations. This figure is often cited in insect farming comparisons with conventional livestock because it is a normalized comparison, but for farm operations management, live-weight FCR is more directly actionable.

How Feed Formulation Affects FCR

Protein content of the diet significantly affects both growth rate and FCR. Diets in the 18 to 22% crude protein range (standard chick starter) produce the best combination of growth rate and feed efficiency for Acheta domesticus. Diets below 16% protein result in slower growth and higher FCR because crickets need to consume more feed to meet their protein requirements. Diets above 25% protein do not consistently improve FCR and add feed cost.

Carbohydrate supplementation (wheat bran, oat bran) improves FCR in some formulations by providing readily available energy that spares protein for growth rather than energy. A common formulation is 80% chick starter crumble blended with 20% wheat bran by weight. Many producers have found this blend produces better FCR than chick starter alone, and the cost per unit of nutrition is often lower.

Fat content in the diet affects final product fat composition. If your buyers specify a fat percentage in the finished flour, work backward from that target when formulating feed during the last 10 to 14 days of the grow cycle.

Water Access and FCR

Crickets that have inadequate water access eat less and grow more slowly, which degrades FCR. Every waterer check you perform is an FCR management activity. Consistent, reliable water access throughout the grow cycle is one of the highest-return daily management tasks you can standardize.

Feed Waste Reduction

Feed that falls to the bin floor and is mixed with waste is lost. Minimizing this spillage is a meaningful FCR improvement lever. Gravity-fed feeders (repurposed chick feeders, 1-quart to 1-gallon jar feeders) reduce spillage versus broadcast feeding. Some producers use overhead feed trays suspended above the bin floor to reduce contamination from cricket waste.

Feed the right amount per check. Overloading feeders leads to stale or moisture-contaminated feed that crickets refuse, which increases apparent waste. Calibrate your feed additions to what the bin will consume within 24 to 36 hours rather than loading a full week's supply at once.

Calculating and Tracking FCR

Calculate FCR per batch, not per farm-wide average. Batch-level FCR lets you see which cohorts, which zones, and which seasons produce the best conversion. Pattern recognition from 20 or 30 batches of batch-level data is what allows you to make meaningful management changes.

Record total feed inputs per batch from start to harvest. Weigh feed additions at each replenishment or estimate them consistently using a calibrated scoop. At harvest, record live weight. Divide total feed by harvest weight. Review this number batch by batch over time and look for trends. Consistent FCR improvement from one quarter to the next is the clearest signal that your management practices are working.