Volume Calculator

Water Storage Tank Calculator

Calculate the exact volume of your storage tank with our comprehensive tank calculator. Whether you need to size a water storage tank, determine oil tank capacity, or calculate chemical storage requirements, our free calculator handles all common tank shapes with instant results in gallons, liters, and cubic feet.

Simply select your tank type, enter the dimensions, and get accurate volume calculations instantly. Our calculator supports horizontal and vertical cylinders, rectangular tanks, oval tanks, capsule tanks, cone-bottom tanks, and more.

Tank Volume Calculator

Enter Dimensions

in
in
in
Length Diameter

Calculation Results

Total Tank Volume 0 gallons
Volume in Liters 0 liters
Volume in Cubic Feet 0 ft³

How to Calculate Tank Volume by Shape

Horizontal Cylindrical Tanks

The most common type of storage tank. To calculate volume:

Volume = π × r² × L
Where: r = radius, L = length

Example: A 4-foot diameter tank that's 10 feet long holds approximately 942 gallons.

Vertical Cylindrical Tanks

Common for water towers and industrial storage. Uses the same formula with height:

Volume = π × r² × H
Where: r = radius, H = height

Rectangular Tanks

The simplest calculation - multiply length × width × height:

Volume = L × W × H

To convert cubic inches to gallons, divide by 231.

Frequently Asked Questions

Why choose cylindrical tanks over rectangular?
Cylindrical tanks offer better pressure distribution with no weak corners, use less material for the same volume, and are generally more cost-effective for large-scale storage.
How accurate are these calculations?
Our calculator provides results accurate to within 0.5% for ideal geometric shapes. Real tanks may vary slightly due to manufacturing tolerances or internal components.

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