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A 'permille' or 'per mille' (Latin, literally meaning 'for (every) thousand') is a tenth of a percent or one part per thousand. It is written with the sign ‰ (Unicode U+2030)., which looks like a percent sign (%) with an extra '₀' at the end. It is a stylized form of the three zeros in the denominator.
A permille is defined as:
:1‰ = 10⁻³= = 0.001 = 0.1%

Contents

Examples

Related units

Examples

Examples of common use are:

★ Blood alcohol content

★ Seawater salinity. For example "the average salinity is 35‰".

★ Tunnel gradients

★ Birth and death rates.

★ When used to describe property taxation in the U.S., it is called the 'millage rate'.

Related units

★ Percentage point

★ Percent (%) 1 part in 100.

★ Basis point (‱) 1 part in 10,000.

★ Parts per million (ppm).

★ Parts per billion (ppb).

★ Parts per trillion (ppt).