Litre of Pure Alcohol. This is the measure used by the whisky industry to account for the alcoholic content of a spirit. You multiply the bulk liquid quantity by the alcohol strength of the liquid to arrive at the number of litres of pure alcohol. So, a cask of whisky holding 250 bulk litres at a strength of 63% contains 157.5 LPA. Found on https://www.whiskyinvestdirect.com/about-whisky/glossary