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

Weight Grams (g)

Required number in g.

Length Centimeters (cm)

Required number in cm.

The cited overview of Standard weight in fish supplies background for the terminology and domain context used by this tool.^[1]

Calculate the conventional Fulton condition factor from grams and centimetres. Inputs are interpreted exactly in the displayed units and the calculation returns the following fields without presentation rounding.

Fulton Condition Factor (index)

Returned number in index.

• 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.

• Condition Factor

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

• Alkalinity Requirement

  Estimate alkalinity equivalent consumed by nitrification using an explicitly entered CaCO3-per-N factor.

• Daily Growth Coefficient

  Compare cube-root body-weight growth per day; weight units must remain grams for comparison across batches.