API Grvity of Common Fuels

The term “API gravity” refers to the American Petroleum Institute gravity, which is a measure of how heavy or light a petroleum liquid is compared to water. It is an important characteristic used in the classification of crude oils and other liquid hydrocarbons.

API gravity is expressed in degrees, with higher values indicating lighter and less dense liquids. The scale is defined so that water has an API gravity of 10, and liquids with API gravity greater than 10 are lighter than water, while those with API gravity less than 10 are heavier.

The following table provides a curated list of density values for various fuels at 15°C (59°F) and 1 atmospheric (atm) pressure. (1 atm = 101,325 Pa)