Per

Per is a Latin preposition 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, historic county in Scotland

Math and statistics

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

 * Per (given name), a Scandinavian form of Peter
 * Per (storm), a storm in Sweden, in January 2007
 * Packed Encoding Rules, in computing, an ASN.1 wire format
 * Per sign