Aquarium Tank Volume Calculator
Calculate your aquarium's water volume in gallons and liters based on tank dimensions and shape.
Tank Dimensions
Tank Volume
Enter tank dimensions to calculate volume
Common Aquarium Sizes
| Size | Dimensions (L×W×H) | Weight (full) |
|---|---|---|
| 10 gallon | 20" × 10" × 12" | 111 lbs |
| 20 gallon | 24" × 12" × 16" | 225 lbs |
| 29 gallon | 30" × 12" × 18" | 330 lbs |
| 55 gallon | 48" × 13" × 21" | 625 lbs |
| 75 gallon | 48" × 18" × 21" | 850 lbs |
| 125 gallon | 72" × 18" × 22" | 1400 lbs |
Frequently Asked Questions
How much does aquarium water weigh?
Fresh water weighs about 8.34 lbs per gallon. Saltwater weighs about 8.6 lbs per gallon. Add tank, stand, and equipment weight too.
How many fish per gallon?
The '1 inch per gallon' rule is a rough guide. Consider fish species, filtration, and swimming patterns. Research specific species needs.
What's actual vs. calculated volume?
Actual water volume is typically 10-15% less due to substrate, decorations, equipment, and not filling completely to the top.
How do I calculate irregular shaped tanks?
For complex shapes, fill with measured water or use the displacement method with a known volume container.
Related Calculators
Disclaimer
Calculations are estimates. Actual water capacity varies. Always ensure your floor/stand can support the total weight of a filled aquarium.