Title: quantity
Long Title: IUPAC Gold Book - quantity
DOI: 10.1351/goldbook.Q04982
Status: current

Definition
Attribute of a phenomenon, body or substance that may be distinguished qualitatively and determined quantitatively.

Notes
1) The term quantity may refer to a quantity in a general sense, for example length, mass, or to a particular quantity, for example length of a particular rod, mass of a specified object.
2) The term kind-of-quantity refers to the abstract concept of a quantity common to a group of related quantities.

Related Term
- kind-of-quantity: https://goldbook.iupac.org//terms/view/K03393

Source
- PAC, 1996, 68, 957. 'Glossary of terms in quantities and units in Clinical Chemistry (IUPAC-IFCC Recommendations 1996)' on page 987 (https://doi.org/10.1351/pac199668040957)

Other Outputs
- html: https://goldbook.iupac.org/terms/view/Q04982/html
- json: https://goldbook.iupac.org/terms/view/Q04982/json
- xml: https://goldbook.iupac.org/terms/view/Q04982/xml

Citation: Citation: 'quantity' in IUPAC Compendium of Chemical Terminology, 5th ed. International Union of Pure and Applied Chemistry; 2025. Online version 5.0.0, 2025. 10.1351/goldbook.Q04982
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Accessed: 2026-04-19T07:16:08+00:00