Tank Volume Calculator

Last updated: 05 Nov 2025 | Author: Brij | Review By: Irshad

Share on :

Quickly calculate tank capacity with our Tank Volume Calculator. Works for cylindrical, rectangular, and oval tanks. Get instant results in gallons, liters, or cubic feet with no complex math.

Tank Shape:

Fill Level (optional):

Tank Length:

Tank Width:

Tank Height:

Tank Volume Calculation Results

Tank Volume:

cu ft

Filled Volume:

cu ft

Volume in Gallons:

gallons

Volume in Liters:

liters

Volume in Cubic Feet:

cu ft

Knowing the capacity of your tank is important whether you’re storing water, fuel, or any liquid. The Tank Volume Calculator helps you quickly find how much your tank can hold based on its shape and size.

This tool works for cylindrical, rectangular, and oval tanks and gives results in gallons, liters, cubic feet, or cubic meters.

Why Use a Tank Volume Calculator?

Manually calculating tank volume can be tricky—especially with different shapes. This calculator saves time, reduces errors, and gives instant results in your preferred unit.

Tank Volume Formulas

1. Rectangular Tank Volume Formula

To find the volume of a rectangular (or square) tank:

$V = L \times W \times H$

2. Cylindrical Tank Volume Formula

For a round tank (like a water drum):

$V = \pi \times r^2 \times h$

Where:

$r$ = radius (half of diameter)
$h$ = height (or length if tank is horizontal)

3. Oval (Elliptical) Tank Volume Formula

For an oval or elliptical tank:

$V = \pi \times \frac{a}{2} \times \frac{b}{2} \times L$

Where:

$a$ = width
$b$ = height
$L$ = length

Unit Conversion

Once the volume is found (in cubic inches, feet, or meters), convert it to desired units:

$\text{Gallons} = \text{Cubic Feet} \times 7.48052$

$\text{Liters} = \text{Cubic Meters} \times 1000$

Example Calculation

Let’s calculate the volume of a cylindrical water tank.

Given:

Diameter = 6 ft
Height = 10 ft

$r = \frac{6}{2} = 3 \text{ ft}$

$V = \pi \times 3^2 \times 10 = 282.74 \text{ ft}^3$

Convert cubic feet to gallons:

$282.74 \times 7.48052 = 2114.8 \text{ gallons}$

Result: The tank can hold about 2115 gallons of water.

Benefits of Using the Tank Volume Calculator

Works for all tank shapes
Instant results in gallons, liters, or cubic units
Saves time and avoids manual errors
Great for water storage, fuel management, and industrial use

Check out 1 Similar Calculators:

Tank Volume Calculator

Help Improve This Calculator

Your suggestions help us make better tools for everyone.