Convert US teaspoon to US beer barrel
Unit definitions
US teaspoon
$80$ US minims are equal to $1$ US teaspoon.
US beer barrel
The US beer barrel is defined as exactly $31$ US liquid gallons.
How to convert US teaspoon to US beer barrel
$$\text{Volume}_{\text{bbl (beer)}} = \text{Volume}_{\text{tsp (us)}} \cdot 0.00004200268822530350517973422353089380$$
Examples
Example 1
Convert $50.0\ \text{tsp (us)}$ to $\text{bbl (beer)}$.
$$\text{Volume}_{\text{bbl (beer)}} = 50.0 \cdot 0.00004200268822530350517973422353089380$$
$$\text{Volume}_{\text{bbl (beer)}} = 0.0021$$
$$\therefore \ 50.0\ \text{tsp (us)} = 0.0021 \ \text{bbl (beer)}$$
Example 2
Convert $80.0\ \text{tsp (us)}$ to $\text{bbl (beer)}$.
$$\text{Volume}_{\text{bbl (beer)}} = 80.0 \cdot 0.00004200268822530350517973422353089380$$
$$\text{Volume}_{\text{bbl (beer)}} = 0.00336$$
$$\therefore \ 80.0\ \text{tsp (us)} = 0.00336 \ \text{bbl (beer)}$$
Example 3
Convert $120.0\ \text{tsp (us)}$ to $\text{bbl (beer)}$.
$$\text{Volume}_{\text{bbl (beer)}} = 120.0 \cdot 0.00004200268822530350517973422353089380$$
$$\text{Volume}_{\text{bbl (beer)}} = 0.00504$$
$$\therefore \ 120.0\ \text{tsp (us)} = 0.00504 \ \text{bbl (beer)}$$
Example 4
Convert $135.0\ \text{tsp (us)}$ to $\text{bbl (beer)}$.
$$\text{Volume}_{\text{bbl (beer)}} = 135.0 \cdot 0.00004200268822530350517973422353089380$$
$$\text{Volume}_{\text{bbl (beer)}} = 0.00567$$
$$\therefore \ 135.0\ \text{tsp (us)} = 0.00567 \ \text{bbl (beer)}$$
Example 5
Convert $180.0\ \text{tsp (us)}$ to $\text{bbl (beer)}$.
$$\text{Volume}_{\text{bbl (beer)}} = 180.0 \cdot 0.00004200268822530350517973422353089380$$
$$\text{Volume}_{\text{bbl (beer)}} = 0.00756$$
$$\therefore \ 180.0\ \text{tsp (us)} = 0.00756 \ \text{bbl (beer)}$$