Small Tank (Beginner)
Tank Volume: 10 gallons; Average Adult Fish Length: 2 inches; Inches of Fish per Gallon: 1 inches/gallon
Maximum Total Fish Length: 10 inches; Estimated Number of Fish: 5 fish
Fish Stocking Calculator
Ecology0.0(0)
Estimates the appropriate number of fish to stock in an aquarium or pond based on its size and the fish's adult size. This calculator provides a general guideline; specific needs may vary depending on the species and individual fish.
More tools:Animal & Pet Calculators
How To Use
How to use this calculator
Start with your values, or try a preset.
Step 1
Enter Tank Volume, Average Adult Fish Length, and Inches of Fish per Gallon in the units shown.
Step 2
Read Maximum Total Fish Length and Estimated Number of Fish in the results panel. Results update as you change the inputs.
Step 3
Choose a preset to load an example, then adjust the values for your situation.
Worked Examples
Example calculations
See the inputs and their calculated results.
Medium Tank
Tank Volume: 30 gallons; Average Adult Fish Length: 3 inches; Inches of Fish per Gallon: 1 inches/gallon
Maximum Total Fish Length: 30 inches; Estimated Number of Fish: 10 fish
Large Tank (Community)
Tank Volume: 55 gallons; Average Adult Fish Length: 4 inches; Inches of Fish per Gallon: 1 inches/gallon
Maximum Total Fish Length: 55 inches; Estimated Number of Fish: 13 fish
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