Convert Watt to Horsepower (Metric)
Unit definitions
Watt
The watt is the SI unit of power. It is defined as one joule per second ($1\ \text{W} = 1\ \text{J/s}$).
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.
How to convert Watt to Horsepower (Metric)
$$\text{Power}_{\text{PS}} = \text{Power}_{\text{W}} \cdot 0.001359621617303904323426790324252760$$
Examples
Example 1
Convert $45.0\ \text{W}$ to $\text{PS}$.
$$\text{Power}_{\text{PS}} = 45.0 \cdot 0.001359621617303904323426790324252760$$
$$\text{Power}_{\text{PS}} = 0.061183$$
$$\therefore \ 45.0\ \text{W} = 0.061183 \ \text{PS}$$
Example 2
Convert $65.0\ \text{W}$ to $\text{PS}$.
$$\text{Power}_{\text{PS}} = 65.0 \cdot 0.001359621617303904323426790324252760$$
$$\text{Power}_{\text{PS}} = 0.088375$$
$$\therefore \ 65.0\ \text{W} = 0.088375 \ \text{PS}$$
Example 3
Convert $120.0\ \text{W}$ to $\text{PS}$.
$$\text{Power}_{\text{PS}} = 120.0 \cdot 0.001359621617303904323426790324252760$$
$$\text{Power}_{\text{PS}} = 0.163155$$
$$\therefore \ 120.0\ \text{W} = 0.163155 \ \text{PS}$$
Example 4
Convert $130.0\ \text{W}$ to $\text{PS}$.
$$\text{Power}_{\text{PS}} = 130.0 \cdot 0.001359621617303904323426790324252760$$
$$\text{Power}_{\text{PS}} = 0.176751$$
$$\therefore \ 130.0\ \text{W} = 0.176751 \ \text{PS}$$
Example 5
Convert $180.0\ \text{W}$ to $\text{PS}$.
$$\text{Power}_{\text{PS}} = 180.0 \cdot 0.001359621617303904323426790324252760$$
$$\text{Power}_{\text{PS}} = 0.244732$$
$$\therefore \ 180.0\ \text{W} = 0.244732 \ \text{PS}$$