Work out fish feed requirement instantly with clear inputs, formula shown and shareable results.
Daily ration is a percentage of standing biomass — 5-8% for fry, 2-3% for grow-out and 1-1.5% for large fish. Total feed over the period divided by the feed conversion ratio gives the weight gain, so a good FCR of 1.5 means one and a half kilograms of feed per kilogram of fish produced.
Feed requirement
Feed per day = biomass x feeding rate %; total = per day x days
Growth
Weight gain = total feed / FCR
Metabolic rate per unit body weight declines with size. Feeding a large fish at fry rates wastes feed and pollutes the pond.
Yes — recalculate after each sampling, because biomass rises steadily. Feeding a fixed daily quantity underfeeds late in the cycle and slows growth.