per mille

Also known as per mil, per mill, permil, permill, permille, ‰, permillage, millage

unit for parts per thousand

AI overview

Per mille is a unit of measurement that expresses parts per thousand, similar to how a percentage expresses parts per hundred. It matters because it allows precise measurement of very small quantities or concentrations, particularly useful in fields like chemistry, environmental science, and salinity measurements where such fine-scale precision is needed.

AI-generated from the Wikipedia summary — may contain errors.

Wikidata facts

Followed by: basis point
Follows: percent
Image: Visualisation parts per.svg
Said to be same as: thousandth

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conversion to standard unit: 100
subdivision of this unit: basis point
Commons category: Per mille
maintained by WikiProject: WikiProject Mathematics
unit symbol: ‰
conversion to SI unit: 0.001
measured physical quantity: dimensionless quantity
Unicode character: ‰
numeric value: 0.001
P8168: Kawasaki P-1

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Encyclopedic overview

The phrase per mille (from Latin per mīlle 'in each thousand') indicates parts per thousand. The associated symbol is ‰, similar to a per cent sign % but with an extra zero in the divisor.

Major dictionaries do not agree on the spelling, giving other options of per mil, per mill, permil, permill, and permille.

Excerpted from Wikipedia’s “per mille” article, available under the CC BY-SA 4.0 licence.

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