1. What is the Fish Tank Gallon Calculator?

The Fish Tank Gallon Calculator estimates the volume of water a rectangular aquarium can hold based on its dimensions. It converts cubic inches to gallons (US) using the standard conversion factor.

2. How Does the Calculator Work?

The calculator uses the volume formula:

Where:

• \( Length \) — Longest side of tank (inches)
• \( Width \) — Short side of tank (inches)
• \( Height \) — Vertical measurement (inches)
• 231 — Cubic inches per gallon conversion factor

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

3. Importance of Tank Volume Calculation

Details: Knowing your tank's volume is essential for proper fish stocking, medication dosing, filter selection, and water treatment.

4. Using the Calculator

Tips: Measure inside dimensions (excluding glass thickness). For irregular shapes, use average measurements or divide into rectangular sections.

5. Frequently Asked Questions (FAQ)

Q1: Should I measure inside or outside dimensions?
A: Always measure inside dimensions (water volume) excluding the glass/acrylic thickness.

Q2: How accurate is this calculator?
A: Very accurate for rectangular tanks. For bow-front or cylindrical tanks, specialized formulas are needed.

Q3: Does this account for substrate and decorations?
A: No, this calculates total volume. Actual water volume will be less when accounting for displacement.

Q4: What about metric measurements?
A: For centimeters: Volume = (L×W×H)/1000 = liters. This calculator uses inches/gallons (US).

Q5: How much should I underfill my tank?
A: Typically leave 1-2 inches at top to prevent overflow and allow for surface gas exchange.