Fish Feed & The Right Daily Ration
Feeds carp
Enter fish number, average weight and feeding rate to get daily feed, total feed and biomass — so you feed the right amount, keep the water clean and stop wasting money.
Plan your pond feed
Next: feed about 15 kg/day, splitting into 2–3 meals; budget 450 kg for the next 30 days and re-weigh fish as they grow.
Feed rate (% body weight) falls as fish grow and shifts with water temperature and species; sampled weights keep the estimate honest.
Fish feeding — key facts
- Biomass
- number × average weight
- Daily feed
- biomass × feed rate %
- Total feed
- daily feed × days
- Feed rate
- % of body weight per day
- Fry/fingerlings
- high rate, ~5–10%
- Grow-out fish
- lower rate, ~2–3%
- Over-feeding
- fouls water, wastes money
- Privacy
- Runs in your browser; nothing uploaded
Feed the biomass, not a guess
Pond fish are fed a daily ration set as a percentage of their body weight, so the ration follows the fish as they grow. Work out the biomass — number of fish times average weight — apply the feed rate, and you have the day's feed in kilograms. The rate as a percentage drops as fish get bigger, but the kilograms fed climb because the biomass keeps rising. Get this right and feed goes into growth, not the pond bottom.
This tool gives the biomass, daily feed, total feed over the period and the feed rate from your fish number, average weight and rate. Over-feeding rots in the water, drops oxygen and wastes costly feed; under-feeding stunts growth. Use the ration here as your target, split it across the day, and adjust by watching how fast the fish clean it up. Pair it with the Feed Conversion Ratio and Fish Pond Stocking tools to run the pond by the numbers.
Feed the right amount
Ration set from biomass, not guesswork.
Keep water clean
No excess feed rotting on the pond bottom.
Stop wasting money
Feed goes into growth, not the water.
Plan the period
Total feed tells you how much to buy ahead.
Frequently Asked Questions
How is fish feed requirement calculated?+
Pond fish are fed a daily ration as a percentage of their body weight, so first you need the biomass: number of fish × average weight. Daily feed = biomass × feed rate %. Over a period, total feed = daily feed × days. For example 2000 fish at 150 g each is 300 kg of biomass; at 3% that is 9 kg of feed a day.
What is biomass and why does it drive feeding?+
Biomass is the total live weight of all the fish in the pond — number × average weight. Fish eat in proportion to their body weight, not their number, so biomass is what the feed rate is applied to. As fish grow, biomass rises, so the daily feed in kilograms goes up even though the rate as a percentage usually falls.
What feeding rate should I use?+
Feed rate is given as a percentage of body weight per day and depends mainly on fish size and water temperature. Small fry and fingerlings are fed at a high rate (often 5–10% of body weight), while larger grow-out fish drop to around 2–3% or less. Warmer water raises appetite; cold water lowers it. Use a size-appropriate rate and re-check as fish grow.
Why does the feed rate drop as fish grow?+
Young fish grow fast relative to their size and need a lot of feed per unit of body weight, so the percentage is high. As fish get bigger their growth slows relative to weight and their maintenance needs make up more of the ration, so the percentage falls. The kilograms fed still rise because the biomass is much larger.
What happens if I over-feed?+
Uneaten feed sinks and rots, fouling the water — oxygen drops, ammonia rises and fish get stressed or die, especially overnight. Over-feeding also wastes expensive feed and worsens the feed conversion ratio. Feeding to the calculated ration, then watching whether fish clean it up in a few minutes, keeps water clean and costs down.
How often should I split the daily feed?+
Spread the daily ration over two to four feeds rather than dumping it all at once, so fish eat it before it sinks and fouls the water. Smaller fish and warm water suit more frequent feeding. The total per day stays the figure the calculator gives; you just divide it across feeding times.
Does this work for any fish species?+
Yes — the body-weight-percentage method is universal across carp, tilapia, catfish, rohu, catla and most pond species. The exact feed rate differs by species, size and temperature, so enter a rate suited to your fish; the biomass and feed maths stay the same.
How do I get the average weight?+
Net a sample of fish, weigh them and divide by how many you weighed to get an average, then multiply by the total number for biomass. Sample regularly — weekly or fortnightly — because fish grow quickly and an out-of-date weight makes the feed ration wrong, usually too low.
Are the figures exact?+
They are good planning figures. Real intake varies with temperature, water quality, fish health, oxygen and feed quality. Use the calculator to set the ration, then adjust by observation — if fish finish the feed eagerly you may feed a touch more; if feed is left, cut back to protect the water.
Does it run privately in my browser?+
Yes. All the maths runs in your browser; nothing about your pond, fish numbers or feed is uploaded or stored anywhere. Change the inputs and the daily feed, total feed and biomass update instantly.