Free Aquarium Tool
Aquarium Volume Calculator
Find out exactly how many gallons your tank holds from its dimensions — essential for stocking, dosing and equipment sizing.
Inside length of the tank, in inches
Front-to-back width, in inches
Water height, in inches
Estimates a full water-column volume. Actual water volume is lower once substrate, rock and decor are added.
Need Help Sizing Your Setup?
Bring your numbers to the store and our staff will match filtration, lighting and stocking to your tank — free.
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Questions a Calculator Can't Answer?
That is what we are here for. Visit Gulf Coast Aquatics on Bee Ridge Road and talk it through with people who keep fish.
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14-day quarantined fish
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Free water testing
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Free parking