API Gravity: Definition, Calculation, and Converter

api36API gravity express the gravity or density of crude oil and liquid petroleum products. API is devised jointly by the American Petroleum Institute and the NIST - National Institute ofAPI :Degrees API Gravity. API Gravity Definitions: Definition of API Gravity of water provided by Pedia:. The American Petroleum Institute gravity, or API gravity, is a measure of how heavy or lht a petroleum liquid is compared to