kilopond [kp] Unit Converter

Definition of kilopond [kp] unit

A kilopond (kp), or kilogram-force (kgf), is a non-SI unit of force equal to the gravitational force exerted on a mass of one kilogram under standard gravity: exactly 9.80665 newtons.

History of kilopond [kp] unit

The kilopond emerged from the metric gravitational system, which linked force directly to the weight of a specified mass. It was defined as the force exerted by standard gravity on one kilogram, making it convenient for engineering and technical calculations before SI adoption. The term became common in Europe, especially in mechanical engineering, physics, and instrument specifications. In 1948, the General Conference on Weights and Measures established the name newton for the coherent SI force unit. Although the kilopond persisted for decades, standards increasingly discouraged its use, favoring the newton.

Applications of kilopond [kp] unit

Today, the kilopond is largely obsolete in scientific work, where force is expressed in newtons. It may still appear in older European engineering manuals, machinery ratings, technical catalogs, and historical measurements. Some discussions of gravitational units, vintage scales, or legacy specifications retain kp or kgf, but modern documentation generally provides a conversion to newtons for clarity and compliance.

Complete list of kilopond [kp] unit conversion