Blood alcohol concentration Promille and permille are likely best known as shorthand terms for
Blood Alcohol Concentration, where 1 promille corresponds to 1 gram of alcohol per liter of blood. Promille is used in the legal limits of
blood-alcohol content for driving a road vehicle in some countries: for example: 0.5‰ or 0.8‰.
Cost per mille Sales and marketing Cost per mille (CPM), the price of 1000 units, may be used for views of banner and display advertising, and for emails delivered by
email service providers.
Insurance In UK insurance usage, the cost per mille is the rate per £1000 of insured value. In India, the premium per mille is the rate expressed as thousandths of the sum assured.
Gradients . The 50‰
grade is equivalent to 50m/km or 5%. Gradients (in some countries in
Europe) may be expressed as mm/m or m/km, and written with the per mille symbol.
Isotope ratios Per mille may be used to express
stable isotope ratios—for example: "δ13C was measured at −3.5‰".
Taxation Charity fraction In Italy, it is possible to nominate a charity or charities to receive "five per mille" (5‰) of personal taxation payments.
Property tax Property taxation rates may be expressed as the
millage rate (
U.S.) or
mill rate (
Canada), from
mill (currency), one thousandth of a dollar.
Quantile Permille may also be used to express a
1000-quantile ("999th permille"), but this usage is rare and largely obsolete. Modern publications instead use fractional percentiles ("99.9th percentile").
Salinity Seawater
salinity is often expressed per mille. Average marine salinity is about 35 parts per thousand or 35‰ (3.5%). == Related units ==