 |
This article does not cite any references or sources. Please help improve this article by adding citations to reliable sources. Unsourced material may be challenged and removed. (July 2009) |
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 zero 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%
A per mil should not be confused with ppm (commonly pronounced "parts per mil" in the United States). A measurement in ppm means parts per million, and has as its denominator 1,000,000 and not 1,000.
Examples
Examples of common use are:
- Blood alcohol content (in some countries)
- Seawater salinity. For example "the average salinity is 35‰".
- Tunnel and railway gradients (in some countries)
- Birth and death rates.
- Baseball batting averages, colloquially
- When used to describe property taxation in the U.S., it is called the millage rate. In Canada this is simply called the mill rate.
Related units
- Percentage point
- Percent (%) 1 part in 100
- Basis point (‱) 1 part in 10,000
- Parts-per notation
 |
This typography-related article is a stub. You can help Wikipedia by expanding it. |
This entry is from Wikipedia, the leading user-contributed encyclopedia. It may not have been reviewed by professional editors (see full disclaimer)
