Convert UK fluid ounce to US fluid ounce
Unit definitions
UK fluid ounce
$\frac{1}{160}$ of a UK gallon is a UK fluid ounce.
US fluid ounce
$\frac{1}{128}$ of a US liquid gallon is a US fluid ounce.
How to convert UK fluid ounce to US fluid ounce
$$\text{Volume}_{\text{oz (us)}} = \text{Volume}_{\text{oz (uk)}} \cdot 0.9607599404038839437395273877025581$$
Examples
Example 1
Convert $40.0\ \text{oz (uk)}$ to $\text{oz (us)}$.
$$\text{Volume}_{\text{oz (us)}} = 40.0 \cdot 0.9607599404038839437395273877025581$$
$$\text{Volume}_{\text{oz (us)}} = 38.430398$$
$$\therefore \ 40.0\ \text{oz (uk)} = 38.430398 \ \text{oz (us)}$$
Example 2
Convert $75.0\ \text{oz (uk)}$ to $\text{oz (us)}$.
$$\text{Volume}_{\text{oz (us)}} = 75.0 \cdot 0.9607599404038839437395273877025581$$
$$\text{Volume}_{\text{oz (us)}} = 72.056996$$
$$\therefore \ 75.0\ \text{oz (uk)} = 72.056996 \ \text{oz (us)}$$
Example 3
Convert $120.0\ \text{oz (uk)}$ to $\text{oz (us)}$.
$$\text{Volume}_{\text{oz (us)}} = 120.0 \cdot 0.9607599404038839437395273877025581$$
$$\text{Volume}_{\text{oz (us)}} = 115.291193$$
$$\therefore \ 120.0\ \text{oz (uk)} = 115.291193 \ \text{oz (us)}$$
Example 4
Convert $140.0\ \text{oz (uk)}$ to $\text{oz (us)}$.
$$\text{Volume}_{\text{oz (us)}} = 140.0 \cdot 0.9607599404038839437395273877025581$$
$$\text{Volume}_{\text{oz (us)}} = 134.506392$$
$$\therefore \ 140.0\ \text{oz (uk)} = 134.506392 \ \text{oz (us)}$$
Example 5
Convert $160.0\ \text{oz (uk)}$ to $\text{oz (us)}$.
$$\text{Volume}_{\text{oz (us)}} = 160.0 \cdot 0.9607599404038839437395273877025581$$
$$\text{Volume}_{\text{oz (us)}} = 153.72159$$
$$\therefore \ 160.0\ \text{oz (uk)} = 153.72159 \ \text{oz (us)}$$