# Barrel Volume Calculator

Enter the middle, top, and bottom radius, and height to find the volume of barrel using barrel calculator.

Barrel volume calculator is an online tool that calculates the volume of barrel by using radius and height of a barrel. It determines the barrel capacity at one click.

## Barrel volume formula

The volume of a barrel can be found using the below equation.

Volume of barrel = πh(2R2 + r2)/3

Where,

h = height of barrel,

r = top and bottom radius.

## How to calculate volume of a barrel?

To find barrel volume, follow the below example.

Example:

Find the volume of a barrel if its height is 2 ft, top and bottom radius is 0.4 ft, and middle radius is 0.8 ft.

Solution:

Step 1: Identify the values.

h = 2 ft, r = 0.4 ft, R = 0.8 ft

Step 2: Place the values in barrel volume formula.

V = πh (2R2 + r2)/3

V = 3.14159 × 2 (2 × 0.82 + 0.42)/3

Volume of barrel = 3.016 cubic feet

If you want to calculate how many gallons are in a barrel, multiply the volume in cubic feet with 7.480507.