Convert Fluid dram (US) to US beer barrel
Unit definitions
Fluid dram (US)
$60$ US minims are equal to $1$ US fluid dram.
US beer barrel
The US beer barrel is defined as exactly $31$ US liquid gallons.
How to convert Fluid dram (US) to US beer barrel
$$\text{Volume}_{\text{bbl (beer)}} = \text{Volume}_{\text{fl dr}} \cdot 0.00003150201616897762888480066764817035$$
Examples
Example 1
Convert $30.0\ \text{fl dr}$ to $\text{bbl (beer)}$.
$$\text{Volume}_{\text{bbl (beer)}} = 30.0 \cdot 0.00003150201616897762888480066764817035$$
$$\text{Volume}_{\text{bbl (beer)}} = 0.000945$$
$$\therefore \ 30.0\ \text{fl dr} = 0.000945 \ \text{bbl (beer)}$$
Example 2
Convert $65.0\ \text{fl dr}$ to $\text{bbl (beer)}$.
$$\text{Volume}_{\text{bbl (beer)}} = 65.0 \cdot 0.00003150201616897762888480066764817035$$
$$\text{Volume}_{\text{bbl (beer)}} = 0.002048$$
$$\therefore \ 65.0\ \text{fl dr} = 0.002048 \ \text{bbl (beer)}$$
Example 3
Convert $110.0\ \text{fl dr}$ to $\text{bbl (beer)}$.
$$\text{Volume}_{\text{bbl (beer)}} = 110.0 \cdot 0.00003150201616897762888480066764817035$$
$$\text{Volume}_{\text{bbl (beer)}} = 0.003465$$
$$\therefore \ 110.0\ \text{fl dr} = 0.003465 \ \text{bbl (beer)}$$
Example 4
Convert $140.0\ \text{fl dr}$ to $\text{bbl (beer)}$.
$$\text{Volume}_{\text{bbl (beer)}} = 140.0 \cdot 0.00003150201616897762888480066764817035$$
$$\text{Volume}_{\text{bbl (beer)}} = 0.00441$$
$$\therefore \ 140.0\ \text{fl dr} = 0.00441 \ \text{bbl (beer)}$$
Example 5
Convert $175.0\ \text{fl dr}$ to $\text{bbl (beer)}$.
$$\text{Volume}_{\text{bbl (beer)}} = 175.0 \cdot 0.00003150201616897762888480066764817035$$
$$\text{Volume}_{\text{bbl (beer)}} = 0.005513$$
$$\therefore \ 175.0\ \text{fl dr} = 0.005513 \ \text{bbl (beer)}$$