🐠 Free Calculator
Aquarium Size Calculator
Estimate aquarium volume in gallons and liters based on dimensions. Determine tank weight and recommended filter size.
🐟 Aquarium Volume
0 gallons
⚖️ Water Weight (approx)
0 lbs
💧 Recommended Filter Size
0 GPH
📏 Cubic Inches
0 cu in
🐠 Aquarium volume formula: (Length × Width × Height) ÷ 231 = Gallons. 1 US gallon = 3.785 liters, water weighs ~8.34 lbs per gallon.
💡 Pro tip: For bow front and hexagon tanks, this calculator provides an estimate. Always leave 10-15% empty space at the top. Choose a filter rated for 4-6x your tank volume per hour.