Home Back

Aquarium Tank Gallon Calculator

Aquarium Tank Gallon Formula:

\[ Gallons = Length \times Width \times Height \times 0.00433 \]

inches
inches
inches

Unit Converter ▲

Unit Converter ▼

From: To:

1. What is the Aquarium Tank Gallon Calculator?

The Aquarium Tank Gallon Calculator estimates the volume of water a rectangular aquarium can hold in US gallons based on its dimensions. This is essential for proper stocking, filtration setup, and water treatment planning.

2. How Does the Calculator Work?

The calculator uses the rectangular tank volume formula:

\[ Gallons = Length \times Width \times Height \times 0.00433 \]

Where:

Explanation: The formula calculates the tank's volume in cubic inches and converts it to US gallons using the standard conversion factor.

3. Importance of Tank Volume Calculation

Details: Accurate tank volume calculation is crucial for determining appropriate fish stocking levels, selecting proper filtration systems, dosing water treatments correctly, and planning maintenance schedules.

4. Using the Calculator

Tips: Enter all dimensions in inches. Measure the internal dimensions of the tank for most accurate results. All values must be positive numbers greater than zero.

5. Frequently Asked Questions (FAQ)

Q1: Why use 0.00433 as the conversion factor?
A: This factor converts cubic inches to US gallons (1 gallon = 231 cubic inches, so 1/231 ≈ 0.00433).

Q2: Should I measure internal or external dimensions?
A: Always measure internal dimensions for accurate water volume calculation, as tank walls and substrate reduce actual water capacity.

Q3: How does substrate affect tank volume?
A: Gravel, sand, or other substrates displace water, reducing the actual water volume. Account for this when stocking fish.

Q4: Can this calculator be used for irregularly shaped tanks?
A: No, this calculator is designed for rectangular tanks only. Cylindrical or bow-front tanks require different formulas.

Q5: Is there a difference between US gallons and imperial gallons?
A: Yes, US gallons (3.785 liters) are smaller than imperial gallons (4.546 liters). This calculator uses US gallons.

Aquarium Tank Gallon Calculator© - All Rights Reserved 2025