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SI Units (Simplified) definitions

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  • International System of Units
    A globally accepted measurement system based on six base units, closely related to the metric system.
  • Base Unit
    A fundamental measurement standard assigned to a physical quantity, forming the foundation of SI.
  • Kilogram
    The SI base measurement for mass, represented by the symbol kg.
  • Meter
    The SI base measurement for length, represented by the symbol m.
  • Second
    The SI base measurement for time, represented by the symbol s.
  • Kelvin
    The SI base measurement for temperature, represented by the symbol K.
  • Mole
    The SI base measurement for the amount of substance, represented by the symbol mol.
  • Cubic Meter
    The SI base measurement for volume, represented by the symbol m³, though less used in practice.
  • Liter
    A metric unit for volume, symbolized as L, more commonly used than the SI base unit for volume.
  • Physical Quantity
    A measurable property such as mass, length, or temperature, each linked to a specific SI base unit.
  • Symbol
    A one- or two-letter abbreviation representing an SI unit, such as kg for kilogram or m for meter.
  • Metric System
    A decimal-based system of measurement from which the SI system is derived.