Aquarium Volume Calculator
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Planning estimate only — not veterinary advice. Ask your veterinarian for health decisions. Tank volume in liters and US gallons from cm dimensions.
Tank dimensions (cm)
Volume
72 L
19 US gallons
- Shape
- rectangle
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Tank volume
Rectangular tanks: volume (L) = length × width × height ÷ 1000 when dimensions are in centimeters. Cylindrical tanks: volume = π × radius² × height ÷ 1000.
Actual water volume is less than total volume once you account for substrate, rocks, and equipment displacement. Use this as a gross tank size estimate.
Example: 60 cm × 30 cm × 40 cm = 72 liters (about 19 US gallons).
Common questions
Why measure in centimeters?
Metric dimensions are common on tank labels worldwide. Convert inches to cm (×2.54) if your tape measure is imperial.
Does this set stocking limits?
No. Fish stocking depends on species, filtration, and maintenance — consult aquatic references and retailers.