Rex says
Everyday utility math — the kind you'd otherwise pull up four browser tabs for. I keep it to one clean answer.
Try a scenario
Click to load — tweak from there.Inputs
Result
Fingerlings to stock
15,625
Stocking rate per acre
3,125
Projected harvest biomass (lb)
15,000
Target total harvest weight (lb)
15,000
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One click, a permanent link with your numbers baked in.
How to use this
- 1Enter pond surface area (acres).
- 2Enter target harvest density (lb/acre).
- 3Enter target individual harvest weight (lb).
- 4Enter expected survival to harvest (%).
- 5Read your fingerlings to stock on the right — it updates as you type.
- 6Hit Share to keep the scenario or send it to someone.
About this calculator
Overstocking a pond leads to stunted growth and oxygen crashes, while understocking leaves production and pond capacity on the table. This calculator uses a target harvest density in pounds per acre, an expected survival rate, and target individual harvest weight to back into the number of fingerlings to stock, and separately projects total harvest biomass so you can plan feed purchases and market timing before fish go in the water. Channel catfish ponds with aeration commonly target 2,500-5,000 lb/acre production, while unaerated ponds need to stay well under 1,500-2,000 lb/acre to avoid summer oxygen depletion kills.
Worked example
Using the values the calculator loads with:
Inputs
- Pond surface area: 5 acres
- Target harvest density: 3000 lb/acre
- Target individual harvest weight: 1.2 lb
- Expected survival to harvest: 80 %
Results
- Fingerlings to stock: 15,625
- Stocking rate per acre: 3,125
- Projected harvest biomass (lb): 15,000
- Target total harvest weight (lb): 15,000
What each field means
Inputs
- Pond surface area (acres)
- The pond surface area used in the calculation, measured in acres. Starts at 5 acres so you have a working example on load.
- Target harvest density (lb/acre)
- The target harvest density used in the calculation, measured in lb/acre. Starts at 3000 lb/acre so you have a working example on load. Accepted range: 200–8000 lb/acre.
- Target individual harvest weight (lb)
- The target individual harvest weight used in the calculation, measured in lb. Starts at 1.2 lb so you have a working example on load.
- Expected survival to harvest (%)
- The expected survival to harvest used in the calculation, measured in %. Starts at 80 % so you have a working example on load. Accepted range: 30–98 %.
Results
- Fingerlings to stock
- Returned as a whole number and shown as the headline result. It recalculates instantly whenever you change an input, so you can compare scenarios without reloading.
- Stocking rate per acre
- Returned as a whole number. It recalculates instantly whenever you change an input, so you can compare scenarios without reloading.
- Projected harvest biomass (lb)
- Returned as a whole number. It recalculates instantly whenever you change an input, so you can compare scenarios without reloading.
- Target total harvest weight (lb)
- Returned as a whole number. It recalculates instantly whenever you change an input, so you can compare scenarios without reloading.
FAQ
Why is aeration such a big factor in stocking density?
Fish biomass consumes oxygen proportional to weight, and unaerated ponds rely entirely on natural photosynthesis and surface exchange for oxygen, which caps safe biomass well below what mechanical aeration allows. Adding paddlewheel or diffused aeration can roughly double or triple the safe stocking density for the same pond.
What survival rate should I plan for?
Well-managed catfish or tilapia ponds with good fingerling health and predator control commonly see 75-90% survival to harvest, while ponds with bird predation, poor water quality, or disease pressure can see 50-65% or lower — build a buffer into your fingerling order rather than stocking to the exact target.
Does species change the target harvest density?
Yes significantly — channel catfish and tilapia tolerate higher stocking densities than largemouth bass or trout, which are more sensitive to crowding stress and water quality. Match target lb/acre to established extension guidelines for your specific species and system type.
How does this feed into feed budgeting?
Once you know projected harvest biomass, apply a feed conversion ratio (commonly 1.5-2.2 lb feed per lb of fish gain for warmwater species) against the total weight gain expected from stocking to harvest size to estimate total feed tonnage needed for the season.
Accuracy and limitations
- Estimates assume standard, average conditions — local rules, pricing, and materials vary.
- Results are rounded for readability; add a buffer before ordering, booking, or committing.
- Double-check anything with a real cost attached against a local quote.
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Cite this calculator
Writing about this topic? Grab a citation — every link helps keep these tools free.
RevenueLab. (2026). Aquaculture Pond Stocking Density Calculator. Retrieved from https://www.revenuelab.fyi/toolbox/aquaculture-pond-stocking-density
<p>Source: <a href="https://www.revenuelab.fyi/toolbox/aquaculture-pond-stocking-density" target="_blank" rel="noopener">Aquaculture Pond Stocking Density Calculator — RevenueLab</a> (2026).</p>
Source: [Aquaculture Pond Stocking Density Calculator — RevenueLab](https://www.revenuelab.fyi/toolbox/aquaculture-pond-stocking-density) (2026).