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Cost per kg and break-even point for fish farming

See the cost of each kilo of fish produced and how many kilos the cycle must sell to avoid a loss.

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.

Preliminary estimateRevision 12/11/2026
Cycle costs (R$)
Production and sales

Include all the cycle's costs to see the real result. The default values are only examples.

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—Cost per kg and break-even
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Cost per kg by output

Cost per kg for outputs of 60% to 140% of yours, with the cycle costs held fixed; the highlighted bar is yours.

Tap the chart to see the values.

Cycle result by price

Cycle result for prices of R$ 4 to R$ 14 per kg; where the line crosses zero is the break-even point. The dot is your price.

Tap the chart to see the values.

What if the data changes?

Drag the controls to simulate data different from what you entered (from 30% less to 30% more) and watch the result change instantly.

Tap the chart to see the values.

Cost per kg and result by output

Cost per kilo and cycle result for outputs of 60% to 140% of the one entered, with the cycle costs and the selling price.

Step by step with your numbers

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.

    How to use

    Enter the cycle's fixed costs (depreciation, interest, maintenance), variable costs (fingerlings, feed, energy, labor), the kilos produced, and the sale price. The calculator shows the cost per kg, the margin, and the breakeven point.

    Worked example

    Fixed costs of R$ 40,000 and variable costs of R$ 120,000 in the cycle, 20,000 kg produced and a price of R$ 9.00 per kg.

    Total cost = R$ 160,000. Cost per kg = 160,000 ÷ 20,000 = R$ 8.00. Revenue = 20,000 × 9 = R$ 180,000. Result = R$ 20,000. Variable cost per kg = 6.00. Break-even = 40,000 ÷ (9 − 6) = 13,333 kg.

    Precautions

    • A cycle that does not reach the target weight has a higher cost per kg: check the timing with the growth and harvest point.
    • High mortality reduces the kilos sold without reducing the cost; deduct it from production.
    • For the feed cost, see the feed conversion and feed cost.

    Method, assumptions, and references

    Equations used

    Cost per kg (R$/kg) = (Fixed costs + Variable costs) ÷ Kilos produced
    Variable cost per kg (R$/kg) = Variable costs ÷ Kilos produced
    Break-even point (kg) = fixed costs ÷ (sale price − variable cost per kg)

    Assumptions and limits

    • Whole-cycle costs: fingerlings, feed, energy, labour, maintenance, interest and depreciation.
    • Fixed costs do not change with output within the range analysed.
    • Average sale price for the cycle, excluding freight to the buyer.

    Standards and technical documents

    • Cost records from your own fish farm and local market quotes for the species (current editions).

    Frequently asked questions

    Why does cost per kg fall when the batch produces more?

    Because fixed costs, such as base energy, maintenance and labor, are spread over more kilos.

    Is the breakeven point the same as zero profit?

    Yes, it is the quantity at which revenue covers all costs. Above it there is profit; below it, a loss.

    Should I include depreciation?

    It is recommended, to see the real cost of the business. Without it, the profit looks bigger than it is.

    Can the sale price change in the middle of the cycle?

    Yes. Use the realistic price at the time of sale and redo the calculation if the market changes.