Quantity

Quantity is a property that can exist as a multitude or magnitude, which illustrate the concept of measurement. Quantities can be compared in terms of "more", "less", or "equal", or by assigning a numerical value in terms of a unit of measurement.

Types of Quantity

Quantities are categorized into two types: physical quantities and abstract quantities.

Physical Quantity

A physical quantity is a physical property of a phenomenon, body, or substance, that can be quantified by measurement. It is an attribute of matter, energy, space, or time that is quantifiable.

Abstract Quantity

An abstract quantity is a quantity which can only be understood in terms of its relationship with other quantities. It is a mathematical concept that does not require a physical body for its existence.

Units of Quantity

Quantities are expressed in terms of units. These units can be classified into two types: base units and derived units.

Base Units

A base unit is a defined unit in a system of measurement that is based on an object or event in the physical world.

Derived Units

A derived unit is a unit that is defined by using base units.

See Also

• Measurement
• Physical quantity
• Abstract quantity
• Units of measurement
• Base unit
• Derived unit

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