Convert Cubic inch to US teaspoon
Unit definitions
Cubic inch
The cubic inch is the volume of a cube with edges exactly $1$ inch in length.
US teaspoon
$80$ US minims are equal to $1$ US teaspoon.
How to convert Cubic inch to US teaspoon
$$\text{Volume}_{\text{tsp (us)}} = \text{Volume}_{\text{in³}} \cdot 3.324675320459550421739311089874101$$
Examples
Example 1
Convert $20.0\ \text{in³}$ to $\text{tsp (us)}$.
$$\text{Volume}_{\text{tsp (us)}} = 20.0 \cdot 3.324675320459550421739311089874101$$
$$\text{Volume}_{\text{tsp (us)}} = 66.493506$$
$$\therefore \ 20.0\ \text{in³} = 66.493506 \ \text{tsp (us)}$$
Example 2
Convert $90.0\ \text{in³}$ to $\text{tsp (us)}$.
$$\text{Volume}_{\text{tsp (us)}} = 90.0 \cdot 3.324675320459550421739311089874101$$
$$\text{Volume}_{\text{tsp (us)}} = 299.220779$$
$$\therefore \ 90.0\ \text{in³} = 299.220779 \ \text{tsp (us)}$$
Example 3
Convert $115.0\ \text{in³}$ to $\text{tsp (us)}$.
$$\text{Volume}_{\text{tsp (us)}} = 115.0 \cdot 3.324675320459550421739311089874101$$
$$\text{Volume}_{\text{tsp (us)}} = 382.337662$$
$$\therefore \ 115.0\ \text{in³} = 382.337662 \ \text{tsp (us)}$$
Example 4
Convert $135.0\ \text{in³}$ to $\text{tsp (us)}$.
$$\text{Volume}_{\text{tsp (us)}} = 135.0 \cdot 3.324675320459550421739311089874101$$
$$\text{Volume}_{\text{tsp (us)}} = 448.831168$$
$$\therefore \ 135.0\ \text{in³} = 448.831168 \ \text{tsp (us)}$$
Example 5
Convert $180.0\ \text{in³}$ to $\text{tsp (us)}$.
$$\text{Volume}_{\text{tsp (us)}} = 180.0 \cdot 3.324675320459550421739311089874101$$
$$\text{Volume}_{\text{tsp (us)}} = 598.441558$$
$$\therefore \ 180.0\ \text{in³} = 598.441558 \ \text{tsp (us)}$$