Convert US teaspoon to US fluid ounce
Unit definitions
US teaspoon
$80$ US minims are equal to $1$ US teaspoon.
US fluid ounce
$\frac{1}{128}$ of a US liquid gallon is a US fluid ounce.
How to convert US teaspoon to US fluid ounce
$$\text{Volume}_{\text{oz (us)}} = \text{Volume}_{\text{tsp (us)}} \cdot 0.1666666668780043085531853989705866$$
Examples
Example 1
Convert $20.0\ \text{tsp (us)}$ to $\text{oz (us)}$.
$$\text{Volume}_{\text{oz (us)}} = 20.0 \cdot 0.1666666668780043085531853989705866$$
$$\text{Volume}_{\text{oz (us)}} = 3.333333$$
$$\therefore \ 20.0\ \text{tsp (us)} = 3.333333 \ \text{oz (us)}$$
Example 2
Convert $90.0\ \text{tsp (us)}$ to $\text{oz (us)}$.
$$\text{Volume}_{\text{oz (us)}} = 90.0 \cdot 0.1666666668780043085531853989705866$$
$$\text{Volume}_{\text{oz (us)}} = 15$$
$$\therefore \ 90.0\ \text{tsp (us)} = 15 \ \text{oz (us)}$$
Example 3
Convert $120.0\ \text{tsp (us)}$ to $\text{oz (us)}$.
$$\text{Volume}_{\text{oz (us)}} = 120.0 \cdot 0.1666666668780043085531853989705866$$
$$\text{Volume}_{\text{oz (us)}} = 20$$
$$\therefore \ 120.0\ \text{tsp (us)} = 20 \ \text{oz (us)}$$
Example 4
Convert $140.0\ \text{tsp (us)}$ to $\text{oz (us)}$.
$$\text{Volume}_{\text{oz (us)}} = 140.0 \cdot 0.1666666668780043085531853989705866$$
$$\text{Volume}_{\text{oz (us)}} = 23.333333$$
$$\therefore \ 140.0\ \text{tsp (us)} = 23.333333 \ \text{oz (us)}$$
Example 5
Convert $165.0\ \text{tsp (us)}$ to $\text{oz (us)}$.
$$\text{Volume}_{\text{oz (us)}} = 165.0 \cdot 0.1666666668780043085531853989705866$$
$$\text{Volume}_{\text{oz (us)}} = 27.5$$
$$\therefore \ 165.0\ \text{tsp (us)} = 27.5 \ \text{oz (us)}$$