application
Aquarium Volume Calculator
Calculate the volume of your fish tank or aquarium in gallons or liters based on its dimensions. Supports rectangular, bow front, and cylinder tanks.
Volume formulas sourced from classical solid geometry definitions consistent with NCTM mathematics standards and Common Core State StandardsReview is current.Reviewed: March 2025Full Methodology
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Standard 55-Gallon Aquarium
A classic 121 × 30 × 51 cm rectangular community tank.
Key values: 121 cm · 30 cm · 51 cm · ≈ 185 L
Cylindrical Column Tank
A decorative cylindrical pillar aquarium 0.25 m radius, 0.6 m tall.
Key values: r = 25 cm · h = 60 cm · V ≈ 118 L
Knowing the exact volume of your aquarium is crucial for proper fish care, equipment selection, and water treatment. Use this calculator to find the water capacity of your rectangular, cylindrical, or bow-front fish tank in US gallons, Imperial gallons, or liters. Enter the internal dimensions for the most accurate results.
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