Convert US fluid ounce to US liquid gallon
Unit definitions
US fluid ounce
$\frac{1}{128}$ of a US liquid gallon is a US fluid ounce.
US liquid gallon
The US liquid gallon is a unit of volume equal to $231$ cubic inches.
How to convert US fluid ounce to US liquid gallon
$$\text{Volume}_{\text{gal (liquid) (us)}} = \frac{\text{Volume}_{\text{oz (us)}}}{128}$$
Examples
Example 1
Convert $50.0\ \text{oz (us)}$ to $\text{gal (liquid) (us)}$.
$$\text{Volume}_{\text{gal (liquid) (us)}} = \frac{50.0}{128}$$
$$\text{Volume}_{\text{gal (liquid) (us)}} = 0.390625$$
$$\therefore \ 50.0\ \text{oz (us)} = 0.390625 \ \text{gal (liquid) (us)}$$
Example 2
Convert $65.0\ \text{oz (us)}$ to $\text{gal (liquid) (us)}$.
$$\text{Volume}_{\text{gal (liquid) (us)}} = \frac{65.0}{128}$$
$$\text{Volume}_{\text{gal (liquid) (us)}} = 0.507813$$
$$\therefore \ 65.0\ \text{oz (us)} = 0.507813 \ \text{gal (liquid) (us)}$$
Example 3
Convert $120.0\ \text{oz (us)}$ to $\text{gal (liquid) (us)}$.
$$\text{Volume}_{\text{gal (liquid) (us)}} = \frac{120.0}{128}$$
$$\text{Volume}_{\text{gal (liquid) (us)}} = 0.9375$$
$$\therefore \ 120.0\ \text{oz (us)} = 0.9375 \ \text{gal (liquid) (us)}$$
Example 4
Convert $130.0\ \text{oz (us)}$ to $\text{gal (liquid) (us)}$.
$$\text{Volume}_{\text{gal (liquid) (us)}} = \frac{130.0}{128}$$
$$\text{Volume}_{\text{gal (liquid) (us)}} = 1.015625$$
$$\therefore \ 130.0\ \text{oz (us)} = 1.015625 \ \text{gal (liquid) (us)}$$
Example 5
Convert $165.0\ \text{oz (us)}$ to $\text{gal (liquid) (us)}$.
$$\text{Volume}_{\text{gal (liquid) (us)}} = \frac{165.0}{128}$$
$$\text{Volume}_{\text{gal (liquid) (us)}} = 1.289063$$
$$\therefore \ 165.0\ \text{oz (us)} = 1.289063 \ \text{gal (liquid) (us)}$$