Use this calculation to compare aquaculture production, feeding, growth, water-quality, or hatchery measurements collected with the same definitions and units.

Animal Count (animals)

Required number in animals.

Mean Weight Grams (g)

Required number in g.

The cited overview of Biochemical oxygen demand supplies background for the terminology and domain context used by this tool.^[1]

Estimate live biomass from animal count and sampled mean body mass. Inputs are interpreted exactly in the displayed units and the calculation returns the following fields without presentation rounding.

Biomass Kilograms (kg)

Returned number in kg.

• Species, life stage, temperature, salinity, system design, sampling method, and management practice can materially change aquaculture measurements and suitable operating ranges.
• Use finite inputs in the displayed units, preserve source measurements and assumptions, and independently verify consequential decisions.

Complement the calculation with calibrated water-quality instruments, representative sampling, feed and mortality records, and species-specific guidance from qualified aquatic-health or production professionals.

• Daily Feed Rate

  Convert a chosen daily feeding percentage of live biomass into feed mass per day.

• Ammonia Excretion

  Estimate daily total-ammonia-nitrogen excretion from biomass and an externally determined excretion rate.

• Condition Factor

  Calculate Fulton's mass-length condition factor for weight in grams and length in centimetres; body shape varies by species.