Convert UK fluid ounce to US beer barrel
Unit definitions
UK fluid ounce
$\frac{1}{160}$ of a UK gallon is a UK fluid ounce.
US beer barrel
The US beer barrel is defined as exactly $31$ US liquid gallons.
How to convert UK fluid ounce to US beer barrel
$$\text{Volume}_{\text{bbl (beer)}} = \text{Volume}_{\text{oz (uk)}} \cdot 0.0002421270011098497842085502489169753$$
Examples
Example 1
Convert $35.0\ \text{oz (uk)}$ to $\text{bbl (beer)}$.
$$\text{Volume}_{\text{bbl (beer)}} = 35.0 \cdot 0.0002421270011098497842085502489169753$$
$$\text{Volume}_{\text{bbl (beer)}} = 0.008474$$
$$\therefore \ 35.0\ \text{oz (uk)} = 0.008474 \ \text{bbl (beer)}$$
Example 2
Convert $70.0\ \text{oz (uk)}$ to $\text{bbl (beer)}$.
$$\text{Volume}_{\text{bbl (beer)}} = 70.0 \cdot 0.0002421270011098497842085502489169753$$
$$\text{Volume}_{\text{bbl (beer)}} = 0.016949$$
$$\therefore \ 70.0\ \text{oz (uk)} = 0.016949 \ \text{bbl (beer)}$$
Example 3
Convert $115.0\ \text{oz (uk)}$ to $\text{bbl (beer)}$.
$$\text{Volume}_{\text{bbl (beer)}} = 115.0 \cdot 0.0002421270011098497842085502489169753$$
$$\text{Volume}_{\text{bbl (beer)}} = 0.027845$$
$$\therefore \ 115.0\ \text{oz (uk)} = 0.027845 \ \text{bbl (beer)}$$
Example 4
Convert $130.0\ \text{oz (uk)}$ to $\text{bbl (beer)}$.
$$\text{Volume}_{\text{bbl (beer)}} = 130.0 \cdot 0.0002421270011098497842085502489169753$$
$$\text{Volume}_{\text{bbl (beer)}} = 0.031477$$
$$\therefore \ 130.0\ \text{oz (uk)} = 0.031477 \ \text{bbl (beer)}$$
Example 5
Convert $190.0\ \text{oz (uk)}$ to $\text{bbl (beer)}$.
$$\text{Volume}_{\text{bbl (beer)}} = 190.0 \cdot 0.0002421270011098497842085502489169753$$
$$\text{Volume}_{\text{bbl (beer)}} = 0.046004$$
$$\therefore \ 190.0\ \text{oz (uk)} = 0.046004 \ \text{bbl (beer)}$$