Pound-force to Sthène Converter

A pound-force (lbf) is a unit of force equal to the gravitational force exerted by a mass of one pound under standard Earth gravity. It equals approximately 4.448 newtons and is one of the most common force units in imperial systems.

The pound-force developed from the traditional English pound weight and became standardized for force measurements in countries using imperial units. It provided a practical force unit based on familiar weight measurements, becoming essential in American engineering and industry.

Pound-force is extensively used in the United States for engineering calculations, mechanical specifications, and force measurements. It's standard for bolt torque specifications, mechanical system ratings, material testing, and general engineering applications in imperial systems.

A sthène (sn) is a unit of force in the metre-tonne-second (MTS) system, equal to 1,000 newtons. It was designed as part of an alternative metric system but never achieved widespread adoption.

The sthène was proposed in the early 20th century as part of the metre-tonne-second system, intended to provide more practical unit sizes for engineering applications. However, it was superseded by the adoption of SI units and never gained significant usage.

Sthènes are obsolete and rarely encountered in modern applications. They appear only in historical engineering literature and some specialized contexts. The unit has been completely replaced by kilonewtons and other SI force units in all practical applications.