Convert Kilogram (kg) to Kilogram-force Second/Meter (kgf·s²/m) instantly.
About these units
Kilogram (kg)
The kilogram is the base unit of mass in the SI system and the only SI unit defined directly by a fundamental constant rather than a physical object. Originally, its definition was tied to a platinum–iridium artifact stored in France—the famous "International Prototype Kilogram." Over time, tiny mass changes in the prototype and its official copies created difficulties for high-precision science. In 2019, the kilogram was redefined using Planck's constant, linking mass to the laws of quantum physics through the Kibble balance. This innovation ensures universality, stability, and reproducibility across the world. The kilogram is central to commerce, science, engineering, and every quantitative field dealing with matter. Its decimal relationships with other metric units (grams, milligrams, tons) make it universally convenient. From groceries to spacecraft mass budgets, the kilogram anchors modern mass measurement.
Kilogram-force Second/Meter (kgf·s²/m)
This unusual unit represents a derived inertial mass-like quantity used in older engineering contexts based on gravitational force units rather than pure mass. One kilogram-force is the force exerted by gravity on a mass of one kilogram under standard gravity. When combined with s²/m, this creates a pseudo-mass unit used in engineering calculations involving dynamic systems. Although rarely used today, kgf·s²/m illustrates a transitional phase in engineering where gravitational and inertial concepts were intermixed before SI units standardized distinctions between mass and force.