Things You'll Need
- Tape measure
Instructions
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1
Measure from the bottom of the fish tank to the top. This is the height. For example, a fish tank might have a height of one and a half feet.
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2
Measure from the front of the fish tank to the back of the fish tank. This is the width of the fish tank. For example, a fish tank could have a width of one foot.
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3
Measure across the front of the fish tank. This is the length of the fish tank. For example, a fish tank might have a length of four feet.
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4
Multiply the height by the length by the width. In the example, multiply 1.5 feet by one foot by four feet, which equals a volume of six cubic feet.
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5
Multiply the cubic feet by 7.48051948. In the example, six cubic feet times 7.48051948 equals 44.8831169 gallons.
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