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

Biomass Kilograms (kg)

Required number in kg.

Oxygen Demand Grams Per Kg Hour (g/(kg·h))

Required number in g/(kg·h).

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

Estimate hourly stock oxygen demand from a measured or separately specified per-kilogram rate. Inputs are interpreted exactly in the displayed units and the calculation returns the following fields without presentation rounding.

Oxygen Demand Kg Per Hour (kg/h)

Returned number in kg/h.

• 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.

• BOD Aquaculture

  Compute oxygen demand from initial and final dissolved oxygen with the dilution fraction; incubation duration and controls must be specified externally.

• Feed Cost Per Kg Gain

  Estimate feed cost per kilogram of wet biomass gain from FCR and feed price; other production costs are excluded.

• Aeration Requirement

  Find rated aerator oxygen transfer needed at a user-supplied field transfer efficiency; allow for other oxygen sinks separately.