ounce/gallon (UK) Unit Converter

Definition of ounce/gallon (UK) unit

Ounce per gallon (UK) is a density unit expressing one avoirdupois ounce of mass contained in one UK imperial gallon of volume. It equals approximately 6.236 kilograms per cubic metre (kg/m³).

History of ounce/gallon (UK) unit

The unit combines the avoirdupois ounce, standardized as 1/16 of an avoirdupois pound, with the British imperial gallon, established by the Weights and Measures Act of 1824. The imperial gallon was defined from the volume of ten pounds of distilled water under specified conditions. Ounce-per-gallon notation consequently emerged in British and Commonwealth technical, commercial, and engineering practice, especially before widespread SI adoption. Although still understandable, it is now largely historical or specialized, with kilograms per cubic metre preferred internationally for density reporting.

Applications of ounce/gallon (UK) unit

Ounce per UK gallon may appear in older British specifications, archival documents, and niche engineering or brewing references when describing concentrations, densities, or lightweight materials. It can also support conversion of historical recipes and trade records. For modern laboratory, industrial, and regulatory work, users generally convert it to kilograms per cubic metre or grams per litre.

Complete list of ounce/gallon (UK) unit conversion