Convert Mile per hour to Kilometer per second
Unit definitions
Mile per hour
A mile is a unit of length equivalent to $1\,609.344 \ \text{m}$. Mile per hour is the distance traveled in miles in one hour.
Kilometer per second
Kilometer per second is the distance traveled in kilometers in one second.
How to convert Mile per hour to Kilometer per second
$$\text{Speed}_{\text{km/s}} = \text{Speed}_{\text{mph}} \cdot 0.00044704$$
Examples
Example 1
Convert $40.0\ \text{mph}$ to $\text{km/s}$.
$$\text{Speed}_{\text{km/s}} = 40.0 \cdot 0.00044704$$
$$\text{Speed}_{\text{km/s}} = 0.017882$$
$$\therefore \ 40.0\ \text{mph} = 0.017882 \ \text{km/s}$$
Example 2
Convert $75.0\ \text{mph}$ to $\text{km/s}$.
$$\text{Speed}_{\text{km/s}} = 75.0 \cdot 0.00044704$$
$$\text{Speed}_{\text{km/s}} = 0.033528$$
$$\therefore \ 75.0\ \text{mph} = 0.033528 \ \text{km/s}$$
Example 3
Convert $120.0\ \text{mph}$ to $\text{km/s}$.
$$\text{Speed}_{\text{km/s}} = 120.0 \cdot 0.00044704$$
$$\text{Speed}_{\text{km/s}} = 0.053645$$
$$\therefore \ 120.0\ \text{mph} = 0.053645 \ \text{km/s}$$
Example 4
Convert $140.0\ \text{mph}$ to $\text{km/s}$.
$$\text{Speed}_{\text{km/s}} = 140.0 \cdot 0.00044704$$
$$\text{Speed}_{\text{km/s}} = 0.062586$$
$$\therefore \ 140.0\ \text{mph} = 0.062586 \ \text{km/s}$$
Example 5
Convert $200.0\ \text{mph}$ to $\text{km/s}$.
$$\text{Speed}_{\text{km/s}} = 200.0 \cdot 0.00044704$$
$$\text{Speed}_{\text{km/s}} = 0.089408$$
$$\therefore \ 200.0\ \text{mph} = 0.089408 \ \text{km/s}$$