Convert Horsepower (Metric) to Horsepower (Imperial)
Unit definitions
Horsepower (Metric)
The metric horsepower is defined as the ability to raise one kilogram by a meter within a second ($1\ \text{PS} \approx 735.499\ \text{W}$). An engine's power is commonly measured using brake horsepower. The brake horsepower is the engine's true output power (in horsepower) before any losses in the gearbox and other components. The horsepower in bhp refers to either metric horsepower or imperial horsepower depending on the vehicle manufacturer.
Horsepower (Imperial)
The imperial horsepower is defined as $550$ foot-pounds per second (i.e., the ability to raise $550$ pounds by a foot within a second). One imperial horsepower is approximately $745.7$ watts.
How to convert Horsepower (Metric) to Horsepower (Imperial)
$$\text{Power}_{\text{hp}} = \text{Power}_{\text{PS}} \cdot 0.9863200706195313428991668485485122$$
Examples
Example 1
Convert $30.0\ \text{PS}$ to $\text{hp}$.
$$\text{Power}_{\text{hp}} = 30.0 \cdot 0.9863200706195313428991668485485122$$
$$\text{Power}_{\text{hp}} = 29.589602$$
$$\therefore \ 30.0\ \text{PS} = 29.589602 \ \text{hp}$$
Example 2
Convert $65.0\ \text{PS}$ to $\text{hp}$.
$$\text{Power}_{\text{hp}} = 65.0 \cdot 0.9863200706195313428991668485485122$$
$$\text{Power}_{\text{hp}} = 64.110805$$
$$\therefore \ 65.0\ \text{PS} = 64.110805 \ \text{hp}$$
Example 3
Convert $120.0\ \text{PS}$ to $\text{hp}$.
$$\text{Power}_{\text{hp}} = 120.0 \cdot 0.9863200706195313428991668485485122$$
$$\text{Power}_{\text{hp}} = 118.358408$$
$$\therefore \ 120.0\ \text{PS} = 118.358408 \ \text{hp}$$
Example 4
Convert $130.0\ \text{PS}$ to $\text{hp}$.
$$\text{Power}_{\text{hp}} = 130.0 \cdot 0.9863200706195313428991668485485122$$
$$\text{Power}_{\text{hp}} = 128.221609$$
$$\therefore \ 130.0\ \text{PS} = 128.221609 \ \text{hp}$$
Example 5
Convert $160.0\ \text{PS}$ to $\text{hp}$.
$$\text{Power}_{\text{hp}} = 160.0 \cdot 0.9863200706195313428991668485485122$$
$$\text{Power}_{\text{hp}} = 157.811211$$
$$\therefore \ 160.0\ \text{PS} = 157.811211 \ \text{hp}$$