Start / Livestock and aquaculture / Fish farming
See how many fish and how many kilos of live weight there are per cubic meter of pond or tank.
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 fish per cubic meter for densities of 20 to 100 fish/m³, with the batch's average weight; the highlighted bar is yours.
Kilos of fish per cubic meter with the batch's fish and weights of 0.1 to 1.5 kg; the dot is your batch.
Drag the controls to simulate data different from what you entered (from 30% less to 30% more) and watch the result change instantly.
Biomass, in kg per cubic metre, for densities of 20 to 100 fish/m³ and different average weights.
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 stocked, the average weight, the usable water volume, and, if you wish, the target density for the species and system. The calculator shows the density in fish and in kilos per cubic meter, and the number of fish for the target.
12,000 fish of 80 g in 300 m³ of usable water, with a target density of 50 fish/m³.
Density = 12,000 ÷ 300 = 40 fish/m³. Biomass = 12,000 × 0.080 ÷ 300 = 3.2 kg/m³. Fish for the target = 50 × 300 = 15,000.
It depends on the species, the system (pond, net cage, or concrete tank), and the level of aeration and water exchange. Use the species manual's recommendation and your own experience.
Because it is the biomass that consumes oxygen, produces ammonia and stresses water quality. Many small fish can still have a low biomass.
Yes, the usable water volume. Subtracting the bottom and freeboard matters, especially in shallow ponds.
No. The number of fish drops with losses and the biomass rises with weight. Recalculate over the cycle.
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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