Per is a Latin

preposition Prepositions and postpositions, together called adpositions (or broadly, in traditional grammar, simply prepositions), are a class of words used to express spatial or temporal relations (''in'', ''under'', ''towards'', ''before'') or mark various ...

which means "through" or "for each", as in per capita. Per or PER may also refer to:

Places

* IOC country code for Peru * Pér, a village in Hungary * Chapman code for

Perthshire Perthshire (locally: ; gd, Siorrachd Pheairt), officially the County of Perth, is a historic county and registration county in central Scotland. Geographically it extends from Strathmore in the east, to the Pass of Drumochter in the north, ...

, historic county in Scotland

Math and statistics

* Rate (mathematics), ratio between quantities in different units, described with the word "per" *

Price–earnings ratio The price-earnings ratio, also known as P/E ratio, P/E, or PER, is the ratio of a company's share (stock) price to the company's earnings per share. The ratio is used for valuing companies and to find out whether they are overvalued or under ...

, in finance, a measure of growth in earnings * Player efficiency rating, a measure of basketball player performance * Partial equivalence relation, class of relations that are symmetric and transitive * Physics education research

Science

* Perseus (constellation), standard astronomical abbreviation * Period (gene) or ''per'' that regulates the biological clock and its corresponding protein PER * Protein efficiency ratio, of food * PER or peregrinibacteria, a candidate bacterial phylum

Media and entertainment

* PeR (band), a Latvian pop band * ''Per'' (film), a 1975 Danish film

Transport

* IATA code for Perth Airport in Western Australia * National Rail station code for Penrhiwceiber railway station, Rhondda Cynon Taf, Wales

Other