Fish Growth Calculator
Estimate your fish’s growth rate, final weight, and daily feed intake. Based on species, age, weight, feeding rate, and water temperature.
How the fish growth calculator works
This calculator estimates daily growth rate using species-specific growth coefficients, adjusted by a temperature factor based on optimal growth ranges. It then projects the final weight after a chosen period and calculates daily feed requirements as a percentage of body weight. The model also estimates Feed Conversion Ratio (FCR) and total feed needed over the growth period.
Enter the fish species, age, weight, feeding rate, water temperature, and growth period. The calculator instantly shows projected growth, daily feed, FCR, and a comparison across different temperatures.
Step 1: Fish Details
Optimal Temperature Ranges
Tilapia: 26–30°C · Catfish: 25–28°C · Salmon: 10–15°C · Trout: 12–16°C · Carp: 23–28°C · Bass: 22–26°C
Step 2: Growth Parameters
Feeding Guidelines
Juveniles typically require 3–5% of body weight daily; adults require 1–3%. Overfeeding wastes feed and degrades water quality.
Fish Growth Results
Projected Final Weight
Temperature Comparison
| Temperature (°C) | Daily Growth (g/day) | Final Weight (g) | Daily Feed (g) | FCR |
|---|
Growth Projection Over Time
How Growth Is Calculated
Daily Growth = Weight × Growth Coefficient × Temperature Factor
The growth coefficient is species-specific and adjusted by a temperature factor that peaks at the species’ optimum temperature. Feed requirement is calculated as a percentage of body weight, and FCR estimates feed efficiency.
Frequently Asked Questions
What is fish growth rate?
Fish growth rate is the speed at which a fish increases in weight over time, typically expressed as grams per day (g/day) or as a specific growth rate percentage. It is influenced by species, age, water temperature, feeding rate, and water quality.
How is fish growth calculated?
This calculator uses a species-specific growth coefficient, adjusted by a temperature factor, to estimate daily weight gain. The formula is: Daily Growth = Current Weight × Growth Coefficient × Temperature Factor. Feed requirement is calculated as a percentage of body weight.
What is the optimal temperature for fish growth?
Optimal growth temperatures vary by species: Tilapia (26–30°C), Catfish (25–28°C), Salmon (10–15°C), Trout (12–16°C), Carp (23–28°C), Bass (22–26°C). Growth slows dramatically outside these ranges.
How much should I feed my fish daily?
Daily feeding rate depends on species, size, and temperature. Generally, feed 2–5% of body weight per day for juveniles and 1–3% for adults. This calculator provides species-specific feeding recommendations.
What is FCR (Feed Conversion Ratio)?
FCR is the amount of feed needed to produce 1 kg of fish weight gain. Lower FCR means better feed efficiency. Typical FCR values: Tilapia 1.5–1.8, Catfish 1.6–2.0, Salmon 1.0–1.3, Trout 1.0–1.4, Carp 1.8–2.2, Bass 1.3–1.6.
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