Poundal to Sthène Converter

A poundal (pdl) is a unit of force in the foot-pound-second (FPS) system, defined as the force required to accelerate a mass of one pound at a rate of one foot per second squared. It equals approximately 0.138 newtons.

The poundal was introduced in 1879 as part of the foot-pound-second system to provide a force unit based on fundamental physical principles rather than gravitational force. It was designed to be the imperial equivalent of the newton but never achieved widespread adoption.

Poundals are rarely used in modern applications, appearing mainly in historical engineering literature and some specialized physics contexts. They've been largely replaced by pound-force in practical applications and newtons in scientific work.

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 However, it was superseded by the adoption of SI units and never gained significant usage.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.