# Base Quantity

## Contents

## Definition

**Base Quantity**. Quantity kind in a conventionally chosen subset of a given system of quantities, where no subset quantity can be expressed in terms of the others

## Example

The International System of Quantities (ISQ) comprises these base quantities (with their SI base measurement units): length (meter), mass (kilogram), duration (second), electric current (ampere), thermodynamic temperature (kelvin), amount of substance (mole), and luminous intensity (candela). These base quantities are not mutually comparable. All quantities of any one of these kinds are, however, mutually comparable.

## See Also

## Disclaimer

This entry annotates a FIBO Ontology Class. FIBO is a trademark and the FIBO Ontology is copyright of the EDM Council, released under the MIT Open Source License. There is no guarantee that the content of this page will remain aligned with, or correctly interprets, the concepts covered by the FIBO ontology.