Start / Livestock and aquaculture / Fish farming
See how many kilos of feed the fish need per day, based on biomass and feeding rate.
Pre-sizing and estimating tool: the results do not replace a design, calculation, or report signed by a qualified professional, nor verification against the applicable standards.
Kilos of feed per day for rates of 0.5% to 4% of live weight; the highlighted bar is yours.
Kilos of feed per meal for 1 to 6 meals per day; the highlighted bar is your schedule.
Drag the controls to simulate data different from what you entered (from 30% less to 30% more) and watch the result change instantly.
Kilos of feed per meal for different feeding rates and numbers of meals, with the batch biomass you entered.
The calculation done in steps, with the values you entered.
The calculation memo gathers this page's inputs, results, equations, assumptions, and references, with fields for project, responsible person, and review. The full report also includes the charts and interpretations, in color. In the print window, choose Save as PDF.
Enter the number of fish, the average weight, the feeding rate for the day (per the species table), and the number of meals. The calculator shows the biomass, the daily feed, and the amount per meal.
5,000 fish of 300 g, feeding rate of 2.0% of live weight and 3 meals per day.
Biomass = 5,000 × 0.300 = 1,500 kg. Feed for the day = 1,500 × 0.02 = 30 kg/day. Per meal = 30 ÷ 3 = 10 kg.
The feeding rate falls as fish weight increases and with water temperature. Use the species table for the weight and the day's temperature, and adjust it based on the feed visible in the feeding tray.
So the fish eat better, waste less feed and leave no leftover food to pollute the water. In general, several smaller meals give better results.
The calculated feed is a supply reference. Actual intake varies with the appetite of the flock. Watch the feeder and adjust.
Leftover feed pollutes the water, consumes oxygen and worsens conversion. It can cause deaths in a short time, especially on hot days.
Important notice: the Agrocalcs tools make estimates and preliminary sizing based on the data entered and on published engineering methods. They do not replace a design, a calculation report or a report signed by a qualified professional (CREA/ART), nor verification against the applicable technical standards and legislation, such as the Regulatory Standards of the Ministry of Labor. Material and fuel properties vary: check with the manufacturer or with analyses of your process before deciding. By using the site, you agree to the Terms of Use.
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