Centimetre–gram–second (CGS) system of units Centimetre-gram-second system of units An overview of the centimetre–gram–second (CGS) system: base units, common derived measures (dyne, erg, barye), electrical variants, history, conversions and how CGS differs from S…
International System of Units (SI): overview, base units, and uses International System of Units The International System of Units (SI) is the modern metric standard of measurement. This article explains its seven base units, derived units, history, global adoption, and everyd…
Square metre (m²): definition, notation, conversions and uses Square metre The square metre (m²) is the SI derived unit of area, defined by a square with 1 metre sides. This article explains its definition, notation, scaling with prefixes, common conversi…
United States customary units Overview of the U.S. customary system: its principal length, area, volume, mass and temperature units, history of use and metrication, practical applications, and key differences f…
