mole

SI unit of amount of substance

EntitySI base unit unit of amount of substance UCUM derived unitQ41509

Also known as mol

Instance of: SI base unit
1
Sources
1.Stated in ISO 80000-1:2009 Quantities and units—Part 1: General
View statement on Wikidata ↗
, unit of amount of substance
1
Sources
1.Stated in SI Brochure (9th edition)
View statement on Wikidata ↗
, UCUM derived unit
+1 more

Overview

From Wikipedia, the free encyclopedia · Read full article · Text CC BY-SA 4.0

The mole (symbol mol) is a unit of measurement, the base unit in the International System of Units (SI) for amount of substance. One mole is an aggregate of exactly 6.02214076×1023 elementary entities which can be atoms, molecules, ions, ion pairs, or other particles. This number of entities equals 602,214,076,000,000,000,000,000, approximately 602 sextillion or 602 billion multiplied by one trillion. The number of particles in a mole is the Avogadro number (symbol N0) and the numerical value of the Avogadro constant (symbol NA) has units of mol−1. The relationship between the mole, Avogadro number, and Avogadro constant can be expressed in the following equation:The current SI value of the mole is based on the historical definition of the mole as the amount of substance that corresponds to the number of atoms in 12 grams of 12C, which made the molar mass of a compound in grams per mole, numerically equal to the average molecular mass or formula mass of the compound expressed in daltons. With the 2019 revision of the SI, the numerical equivalence is now only approximate, but may still be assumed with high accuracy.

Overview

All data

51 statements · 20% with external sources · numbers in brackets are citations

Measured physical quantity: amount of substance
2
Sources
1.Stated in ISO 80000-1:2009 Quantities and units—Part 1: General
2.Stated in SI Brochure (9th edition): Concise summary
View statement on Wikidata ↗
extent of reaction
Conversion to SI unit: 1 mole
Unit symbol: mol
4
Sources
1.Stated in Logopedia
2.Stated in ISO 80000-1:2009 Quantities and units—Part 1: General
3.Stated in SI Brochure (9th edition)
4.Stated in SI Brochure (9th edition): Concise summary
View statement on Wikidata ↗
mol
mol
Named after: molecule
Subdivision of this unit: decimole
Conversion to standard unit: 10 decimole
Different from: Mol

On other databases

35 identifiers linking mole across the web's reference databases

Data quality

statements

20%

externally sourced

Source last edited September 20, 2026. AIDB refreshes this page daily.

Suggest a fact or correction

Links

Use this data

curl https://aidb.si/api/v1/entities/Q41509

API docs, limits & keys

Cite this page

AIDB. (2026). mole (Q41509). Retrieved from https://aidb.si/e/mole-Q41509