Horsepower (Metric)

Definition

Metric horsepower (often abbreviated as PS or metric hp) is a unit of power equivalent to **0.986 horsepower (Imperial) **. It is not an SI unit but is widely used in Europe and other regions for measuring engine power.

History

The term "horsepower" was coined in the late 18th century by James Watt to compare steam engine power to that of horses. The metric horsepower was later defined in the early 20th century, primarily to align with the metric system. The standard value of 1 PS was formally defined as 75 kilograms-meter per second.

Uses

Metric horsepower is commonly used in the automotive industry, especially in Europe, to denote engine power. It also appears in various technical specifications for machinery and equipment, facilitating comparison among different power sources.

Conversions

• 1 metric horsepower (PS) = 0.7355 kilowatts (kW)
• 1 metric horsepower (PS) = 1.014 horsepower (Imperial)

Fun Facts

• A common misconception is that all horsepower measurements are the same; they vary depending on the definition used ( metric vs. Imperial).
• The term "horsepower" remains popular in automotive marketing, despite the rise of electric vehicles where power is often measured in kilowatts.