1. What is a Fish Tank Size Calculator in Gallons?

Definition: This calculator estimates the volume of a fish tank in gallons based on its length, width, and height measurements in inches.

Purpose: It helps aquarium enthusiasts and pet store professionals determine the water capacity of rectangular fish tanks.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( V_{gal} \) — Volume in gallons
• \( L \) — Length of tank (inches)
• \( W \) — Width of tank (inches)
• \( H \) — Height of tank (inches)

Explanation: The formula converts cubic inches to gallons (1 gallon = 231 cubic inches).

3. Importance of Tank Volume Calculation

Details: Knowing your tank's volume is crucial for proper fish stocking, medication dosing, filter selection, and heater sizing.

4. Using the Calculator

Tips: Measure the inside dimensions of your tank (excluding glass thickness) for accurate results. All values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: Why divide by 231?
A: There are 231 cubic inches in one US gallon, which is the standard conversion factor.

Q2: Does this work for irregularly shaped tanks?
A: No, this formula is only for rectangular tanks. Cylindrical tanks require a different formula.

Q3: Should I include the tank's glass thickness in measurements?
A: No, measure only the internal dimensions where water will be held.

Q4: How accurate is this calculation?
A: It's accurate for rectangular tanks, but remember decorations and substrate will reduce actual water volume.

Q5: Can I use this for saltwater reef tanks?
A: Yes, but account for displacement from live rock and coral when stocking fish.