Fish Tank Volume Formula:
| From: | To: | 
Fish tank volume calculation determines the water capacity of an aquarium in gallons. This is essential for proper fish stocking, filtration system selection, and water treatment dosing.
The calculator uses the standard aquarium volume formula:
Where:
Explanation: The formula calculates the cubic volume of the tank and converts it from cubic inches to US gallons using the standard conversion factor.
Details: Knowing your tank's exact volume is crucial for maintaining proper water chemistry, selecting appropriate filtration, determining fish stocking levels, and calculating correct medication dosages.
Tips: Measure the inside dimensions of your tank in inches. Enter length, width, and height as internal measurements (excluding glass thickness). All values must be positive numbers.
                    Q1: Why measure internal dimensions only?
                    A: Internal dimensions give the actual water volume. External measurements include glass thickness, which doesn't hold water.
                
                    Q2: What is the conversion factor 0.00433?
                    A: This converts cubic inches to US gallons (1 gallon = 231 cubic inches, so 1/231 ≈ 0.004329).
                
                    Q3: How accurate is this calculation?
                    A: Very accurate for rectangular tanks. For irregular shapes or tanks with significant substrate/decorations, actual water volume will be less.
                
                    Q4: Should I fill my tank to the very top?
                    A: No, leave about 1-2 inches at the top to prevent overflow and allow for gas exchange at the water surface.
                
                    Q5: Can I use this for cylindrical tanks?
                    A: No, this formula is for rectangular tanks. Cylindrical tanks use: Volume = π × radius² × height × 0.00433.