Liquid Volume Calculator Gallons in a Tank

Liquid Volume Formulas:

\[ V_{gal} = \frac{\pi \times r^2 \times h}{231} \text{ (cylindrical)} \] \[ V_{gal} = \frac{L \times W \times H}{231} \text{ (rectangular, if in inches)} \]

Tank Shape:

Radius:

inches

Height:

inches

Liquid Volume:

gallons

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1. What is a Liquid Volume Calculator for Tanks?

Definition: This calculator estimates the liquid volume in gallons for either cylindrical or rectangular tanks based on their dimensions.

Purpose: It helps professionals and homeowners determine how much liquid a tank can hold, useful for water storage, chemical processing, and aquarium setup.

2. How Does the Calculator Work?

The calculator uses different formulas based on tank shape:

\[ V_{gal} = \frac{\pi \times r^2 \times h}{231} \text{ (cylindrical)} \] \[ V_{gal} = \frac{L \times W \times H}{231} \text{ (rectangular)} \]

Where:

\( V_{gal} \) — Volume in gallons
\( r \) — Radius of cylindrical tank (inches)
\( h \) — Height of cylindrical tank (inches)
\( L, W, H \) — Length, Width, Height of rectangular tank (inches)

Note: The divisor 231 converts cubic inches to gallons (1 gallon = 231 cubic inches).

3. Importance of Liquid Volume Calculation

Details: Accurate volume calculations ensure proper tank sizing, chemical dosing, and system design for various applications.

4. Using the Calculator

Steps:

Select tank shape (cylindrical or rectangular)
Enter dimensions in inches
All values must be > 0

5. Frequently Asked Questions (FAQ)

Q1: Why 231 in the formula?
A: 231 cubic inches equals 1 US liquid gallon, the standard conversion factor.

Q2: Can I use other units besides inches?
A: The calculator requires inches. Convert other units to inches first (1 foot = 12 inches).

Q3: Does this account for tank thickness?
A: No, it calculates internal volume. For exact capacity, use internal dimensions.

Q4: How accurate is this for irregular shapes?
A: Only accurate for perfect cylinders or rectangles. Use different methods for irregular tanks.

Q5: What about liquid expansion or vapor space?
A: This calculates total volume. Always leave appropriate headspace in actual applications.