Fish Tank Volume Calculator
Calculate fish tank water volume from length, width and height, with liters and gallon conversions for stocking and dosing.
Calculate your aquarium's water volume in liters and gallons by entering the tank dimensions. Helps fish keepers determine proper stocking density, medication dosage, and water change amounts.
📊 Result Chart
About Fish Tank Volume Calculator
Fish Tank Volume Calculator is a free online tool that calculates water volume from tank dimensions, supporting liters and gallon conversions, helping fish keepers determine stocking density and medication dosage. Works on mobile and desktop, all calculations run locally in your browser.
Fish Tank Volume Calculator in 3 steps
- Enter tank length (cm)
- Enter tank width and height (cm)
- Click "Calculate" to see water volume
How is fish tank volume calculated?
Volume in liters = Length × Width × Height (cm) ÷ 1000. For example, a 60×30×40 cm tank holds 72 liters. US and UK gallons are converted from liters (1 US gallon = 3.785 L, 1 UK gallon = 4.546 L).
Why do I need to know my tank volume?
Tank volume determines safe stocking density, correct medication dosage, and water change amounts. Overstocking or overdosing can harm your fish.
Does the calculator work on mobile?
Yes. The tool is fully responsive and all calculations run locally in your browser — no data is uploaded to any server.