Fish Tank Calculator
Calculate volume and water weight for your aquarium setup.
Total Volume
0 gal
0 Liters
Estimated Water Weight
0 lbs
Choosing the Right Tank
Volume vs. Surface Area
Surface area is crucial for gas exchange (oxygen entering the water). A long, shallow tank often supports more fish than a tall, narrow tank of the same volume.
The "Inch per Gallon" Rule
A classic (though simplified) rule is "one inch of fish per gallon of water." However, this only applies to small, slim fish like tetras. Large fish like goldfish or cichlids produce much more waste and need far more volume per inch.
Placement
Avoid placing tanks in direct sunlight (promotes algae) or near drafts/vents (causes temperature fluctuation). Ensure the stand can support the full weight (Water is ~8.34 lbs/gallon).
Common Standard Sizes
10 Gallon20" x 10" x 12"
20 Gallon Long30" x 12" x 12"
29 Gallon30" x 12" x 18"
55 Gallon48" x 13" x 21"
75 Gallon48" x 18" x 21"
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