Volume Of Aquarium Calculator
Calculate the water volume of a rectangular aquarium in liters and gallons. Useful for determining water capacity, fish stocking, and equipment sizing.
Published by:
isCalculator Editorial Team
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How to use this tool?
This calculator computes the volume of a rectangular aquarium in liters and US gallons.
- Enter dimensions in centimeters – Input the Length, Width, and Height of your aquarium in the fields provided. Use positive numbers (e.g., 60, 30.5).
- Click "Calculate Volume" – The calculator will validate your inputs and compute the volume.
- View results – The volume appears in liters (L) and US gallons (gal). The formula used is: Length × Width × Height ÷ 1000 = liters, then liters × 0.264172 = gallons.
Note: All measurements must be in centimeters. If you have inches, convert to cm first (1 inch = 2.54 cm).
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Frequently Asked Questions
Measure the internal length, width, and height of your aquarium in centimeters (cm). Use a tape measure for accuracy. For a rectangular tank, measure from inside edge to inside edge.
No, this calculator provides the total water volume of an empty tank. Substrate, decorations, and equipment will displace some water, so actual water volume will be slightly less. Subtract about 10% for a rough estimate.
Volume in liters = Length (cm) × Width (cm) × Height (cm) ÷ 1000. To convert to US gallons, multiply liters by 0.264172.