A railroad distance sign in the Czech Republic with a 20? grade, which is equivalent to 2%.

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= = 0.001 = 0.1%

Examples

Examples of common use are:

• Blood alcohol content
• 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)

be:??????? be-x-old:??????? bg:?????? cv:???????? cs:Promile da:Promille de:Promille et:Promill es:Por mil eo:Elmilo fr:Pour mille zh-classical:??? ko:?? is:Prómill he:?????? hu:Ezrelék nl:Promille ja:???? no:Promille nn:Promille pl:Promil ru:???????? sk:Promile sl:Odtiso?ek sr:?????? fi:Promille sv:Promille uk:??????? wuu:??? zh:???