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A per mil or per mille (also spelled permil, per mill or promille) (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 can be seen as a stylized form of the three zeros in the denominator, although it originates from an alteration of the percent sign.
A per mil is defined as:
- 1‰ = 10−3= 1⁄1000 = 0.001 = 0.1%
Examples
Examples of common use are:
- Blood alcohol content (in some countries)
- Seawater salinity. For example 'the average salinity is 35‰'.
- Tunnel gradients
- Railway gradients
- Birth and death rates.
- Baseball batting averages, colloquially
- 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)
Article is licensed under GNU Free Documentation License.
It uses material from Wikipedia.org Original article is here.
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