Convert Slug to Milligram

FromSlug (slug)

ToMilligram (mg)

Slug

The slug is a unit of mass used in the imperial system and the U.S. customary system, primarily in the context of physics and engineering. It is defined as the mass that will accelerate by 1 foot per second squared (1 ft/s²) when a force of 1 pound-force is applied. One slug is approximately 14.5939 kilograms.

Origin:

The slug was introduced in the late 19th century as part of the foot-pound-second (FPS) system, which was developed to be more consistent with the principles of mechanics, particularly Newton's second law of motion. The term "slug" was chosen because it represented a unit of mass that would help express the relationship between force, mass, and acceleration in a way that was easier to apply in engineering and scientific calculations. The slug is used primarily in the U.S. and some engineering contexts, but it is less common in everyday measurements, where the pound is typically used for mass and weight.

Milligram

The milligram (mg) is a unit of mass in the metric system, equal to one-thousandth of a gram (0.001 g) or one-millionth of a kilogram (0.000001 kg). Since the gram and kilogram are defined using the Planck constant (h) in the International System of Units (SI), the milligram is indirectly tied to this same constant, ensuring precision and consistency.

Origin:

The milligram originated as a derived unit of mass within the metric system, introduced during the French Revolution in the late 18th century. As part of the decimal-based metric system, it was designed to provide a smaller and more convenient unit for measuring very light objects, especially in scientific and medical contexts. It is defined in relation to the gram, which was originally based on the mass of one cubic centimeter of pure water at 4°C.