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Slug


The slug is a unit of mass used primarily in the U.S. customary system and British engineering contexts.



  • 1 slug = 32.174 pounds (lb) (mass)



  • Equivalent to approximately 14.5939 kilograms (kg)



  • Defined so that when a force of one pound-force (lbf) acts on a mass of one slug, it accelerates at 1 ft/s² (using F=maF = ma in imperial units).



Key Facts:



  • Used mainly in physics and engineering for calculations involving Newton’s second law in imperial units



  • Allows consistent use of pound-force and pound-mass without extra conversion factors



  • Useful in dynamics, ballistics, and engineering mechanics



The slug bridges the gap between force and mass in the imperial system, making calculations easier when using pound-force units.



Planck Mass


The Planck mass is a fundamental physical constant in theoretical physics, representing a natural unit of mass based on fundamental constants: the speed of light, gravitational constant, and Planck’s constant.


Its value is approximately 2.18 × 10⁻⁸ kilograms (about 22 micrograms).


The Planck mass is significant in quantum gravity and string theory, marking a scale where quantum effects of gravity become strong and classical physics breaks down.


Summary:



  • Approximately 2.18 × 10⁻⁸ kg (22 micrograms)



  • Derived from fundamental physical constants



  • Important in quantum gravity and theoretical physics



Popular Weight-and-mass Unit Conversions

Convert slug to Other Weight-and-mass Units

slug to kilogram kg
slug to gram [g]
slug to milligram [mg]
slug to ton (metric) [t]
slug to pound [lbs]
slug to ounce [oz]
slug to carat [car,ct]
slug to ton (short) [ton (US)]
slug to ton (long) [ton (UK)]
slug to Atomic mass unit [u]
slug to exagram [Eg]
slug to petagram [Pg]
slug to teragram [Tg]
slug to gigagram [Gg]
slug to megagram [Mg]
slug to hectogram [hg]
slug to dekagram [dag]
slug to decigram [dg]
slug to centigram [cg]
slug to microgram [µg]
slug to nanogram [ng]
slug to picogram [pg]
slug to femtogram [fg]
slug to attogram [ag]
slug to dalton
slug to kilogram-force square second/meter
slug to kilopound [kip]
slug to kip
slug to pound-force square second/foot
slug to pound (troy or apothecary)
slug to poundal [pdl]
slug to ton (assay) (US) [AT (US)]
slug to ton (assay) (UK) [AT (UK)]
slug to kiloton (metric) [kt]
slug to quintal (metric) [cwt]
slug to hundredweight (US)
slug to hundredweight (UK)
slug to quarter (US) [qr (US)]
slug to quarter (UK) [qr (UK)]
slug to stone (US)
slug to stone (UK)
slug to tonne [t]
slug to pennyweight [pwt]
slug to scruple (apothecary) [s.ap]
slug to grain [gr]
slug to gamma
slug to talent (Biblical Hebrew)
slug to mina (Biblical Hebrew)
slug to shekel (Biblical Hebrew)
slug to bekan (Biblical Hebrew)
slug to gerah (Biblical Hebrew)
slug to talent (Biblical Greek)
slug to mina (Biblical Greek)
slug to tetradrachma (Biblical Greek)
slug to didrachma (Biblical Greek)
slug to drachma (Biblical Greek)
slug to denarius (Biblical Roman)
slug to assarion (Biblical Roman)
slug to quadrans (Biblical Roman)
slug to lepton (Biblical Roman)
slug to Planck mass
slug to Electron mass (rest)
slug to Muon mass
slug to Proton mass
slug to Neutron mass
slug to Deuteron mass
slug to Earths mass
slug to Suns mass