Aquarium Size Calculator
Calculate the minimum aquarium size for your fish. Get tank recommendations, filter GPH, and heater wattage based on fish count, size, and type.
Inputs
inches
Results
Minimum Gallons
20 gallons
Recommended25 gallons
Standard Tank29 gallon — 30×12×18 in
Filter Rating100 GPH
Heater125 watts
How to Use This Calculator
- Enter Number of Fish, Average Fish Size, and Fish Type.
- Set Tropical (1 gal/inch), Goldfish (2 gal/inch), and Cichlids (2 gal/inch).
- Adjust Marine (5 gal/inch), Live Plants as needed.
- Review the Minimum Gallons (gallons) result.
- Use Recommended (gallons) and Standard Tank to inform your decision.
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