Convert US teaspoon to UK quart
Unit definitions
US teaspoon
$80$ US minims are equal to $1$ US teaspoon.
UK quart
$40$ UK fluid ounces are equal to $1$ UK quart.
How to convert US teaspoon to UK quart
$$\text{Volume}_{\text{qt (uk)}} = \text{Volume}_{\text{tsp (us)}} \cdot 0.004336844717108548224958150850511099$$
Examples
Example 1
Convert $30.0\ \text{tsp (us)}$ to $\text{qt (uk)}$.
$$\text{Volume}_{\text{qt (uk)}} = 30.0 \cdot 0.004336844717108548224958150850511099$$
$$\text{Volume}_{\text{qt (uk)}} = 0.130105$$
$$\therefore \ 30.0\ \text{tsp (us)} = 0.130105 \ \text{qt (uk)}$$
Example 2
Convert $65.0\ \text{tsp (us)}$ to $\text{qt (uk)}$.
$$\text{Volume}_{\text{qt (uk)}} = 65.0 \cdot 0.004336844717108548224958150850511099$$
$$\text{Volume}_{\text{qt (uk)}} = 0.281895$$
$$\therefore \ 65.0\ \text{tsp (us)} = 0.281895 \ \text{qt (uk)}$$
Example 3
Convert $105.0\ \text{tsp (us)}$ to $\text{qt (uk)}$.
$$\text{Volume}_{\text{qt (uk)}} = 105.0 \cdot 0.004336844717108548224958150850511099$$
$$\text{Volume}_{\text{qt (uk)}} = 0.455369$$
$$\therefore \ 105.0\ \text{tsp (us)} = 0.455369 \ \text{qt (uk)}$$
Example 4
Convert $150.0\ \text{tsp (us)}$ to $\text{qt (uk)}$.
$$\text{Volume}_{\text{qt (uk)}} = 150.0 \cdot 0.004336844717108548224958150850511099$$
$$\text{Volume}_{\text{qt (uk)}} = 0.650527$$
$$\therefore \ 150.0\ \text{tsp (us)} = 0.650527 \ \text{qt (uk)}$$
Example 5
Convert $185.0\ \text{tsp (us)}$ to $\text{qt (uk)}$.
$$\text{Volume}_{\text{qt (uk)}} = 185.0 \cdot 0.004336844717108548224958150850511099$$
$$\text{Volume}_{\text{qt (uk)}} = 0.802316$$
$$\therefore \ 185.0\ \text{tsp (us)} = 0.802316 \ \text{qt (uk)}$$