Convert US beer barrel to Cubic foot
Unit definitions
US beer barrel
The US beer barrel is defined as exactly $31$ US liquid gallons.
Cubic foot
The cubic foot is the volume of a cube with edges exactly $1$ foot in length.
How to convert US beer barrel to Cubic foot
$$\text{Volume}_{\text{ft³}} = \text{Volume}_{\text{bbl (beer)}} \cdot 4.144097222222222222222222222222222$$
Examples
Example 1
Convert $50.0\ \text{bbl (beer)}$ to $\text{ft³}$.
$$\text{Volume}_{\text{ft³}} = 50.0 \cdot 4.144097222222222222222222222222222$$
$$\text{Volume}_{\text{ft³}} = 207.204861$$
$$\therefore \ 50.0\ \text{bbl (beer)} = 207.204861 \ \text{ft³}$$
Example 2
Convert $85.0\ \text{bbl (beer)}$ to $\text{ft³}$.
$$\text{Volume}_{\text{ft³}} = 85.0 \cdot 4.144097222222222222222222222222222$$
$$\text{Volume}_{\text{ft³}} = 352.248264$$
$$\therefore \ 85.0\ \text{bbl (beer)} = 352.248264 \ \text{ft³}$$
Example 3
Convert $120.0\ \text{bbl (beer)}$ to $\text{ft³}$.
$$\text{Volume}_{\text{ft³}} = 120.0 \cdot 4.144097222222222222222222222222222$$
$$\text{Volume}_{\text{ft³}} = 497.291667$$
$$\therefore \ 120.0\ \text{bbl (beer)} = 497.291667 \ \text{ft³}$$
Example 4
Convert $140.0\ \text{bbl (beer)}$ to $\text{ft³}$.
$$\text{Volume}_{\text{ft³}} = 140.0 \cdot 4.144097222222222222222222222222222$$
$$\text{Volume}_{\text{ft³}} = 580.173611$$
$$\therefore \ 140.0\ \text{bbl (beer)} = 580.173611 \ \text{ft³}$$
Example 5
Convert $160.0\ \text{bbl (beer)}$ to $\text{ft³}$.
$$\text{Volume}_{\text{ft³}} = 160.0 \cdot 4.144097222222222222222222222222222$$
$$\text{Volume}_{\text{ft³}} = 663.055556$$
$$\therefore \ 160.0\ \text{bbl (beer)} = 663.055556 \ \text{ft³}$$