Convert US beer barrel to US liquid gallon
Unit definitions
US beer barrel
The US beer barrel is defined as exactly $31$ US liquid gallons.
US liquid gallon
The US liquid gallon is a unit of volume equal to $231$ cubic inches.
How to convert US beer barrel to US liquid gallon
$$\text{Volume}_{\text{gal (liquid) (us)}} = \text{Volume}_{\text{bbl (beer)}} \cdot 31$$
Examples
Example 1
Convert $30.0\ \text{bbl (beer)}$ to $\text{gal (liquid) (us)}$.
$$\text{Volume}_{\text{gal (liquid) (us)}} = 30.0 \cdot 31$$
$$\text{Volume}_{\text{gal (liquid) (us)}} = 930$$
$$\therefore \ 30.0\ \text{bbl (beer)} = 930 \ \text{gal (liquid) (us)}$$
Example 2
Convert $80.0\ \text{bbl (beer)}$ to $\text{gal (liquid) (us)}$.
$$\text{Volume}_{\text{gal (liquid) (us)}} = 80.0 \cdot 31$$
$$\text{Volume}_{\text{gal (liquid) (us)}} = 2480$$
$$\therefore \ 80.0\ \text{bbl (beer)} = 2480 \ \text{gal (liquid) (us)}$$
Example 3
Convert $100.0\ \text{bbl (beer)}$ to $\text{gal (liquid) (us)}$.
$$\text{Volume}_{\text{gal (liquid) (us)}} = 100.0 \cdot 31$$
$$\text{Volume}_{\text{gal (liquid) (us)}} = 3100$$
$$\therefore \ 100.0\ \text{bbl (beer)} = 3100 \ \text{gal (liquid) (us)}$$
Example 4
Convert $145.0\ \text{bbl (beer)}$ to $\text{gal (liquid) (us)}$.
$$\text{Volume}_{\text{gal (liquid) (us)}} = 145.0 \cdot 31$$
$$\text{Volume}_{\text{gal (liquid) (us)}} = 4495$$
$$\therefore \ 145.0\ \text{bbl (beer)} = 4495 \ \text{gal (liquid) (us)}$$
Example 5
Convert $200.0\ \text{bbl (beer)}$ to $\text{gal (liquid) (us)}$.
$$\text{Volume}_{\text{gal (liquid) (us)}} = 200.0 \cdot 31$$
$$\text{Volume}_{\text{gal (liquid) (us)}} = 6200$$
$$\therefore \ 200.0\ \text{bbl (beer)} = 6200 \ \text{gal (liquid) (us)}$$