How does API Gravity varies for different fluids?
API gravity varies for different fluids depending on their hydrocarbon composition and temperature.
Light crude oil: Light crude oil has an API gravity higher than 31.1° (i.e., less than 870 kg/m3). This is because light crude oil is composed of mostly lighter hydrocarbons, such as methane, ethane, and propane.
Medium crude oil: Medium crude oil has an API gravity between 22.3 and 31.1° (i.e., 870 to 920 kg/m3). This is because medium crude oil is composed of a mixture of lighter and heavier hydrocarbons.
Heavy crude oil: Heavy crude oil has an API gravity below 22.3° (i.e., 920 to 1000 kg/m3). This is because heavy crude oil is composed of mostly heavier hydrocarbons, such as asphaltenes and resins.
Extra heavy oil: Extra heavy oil has an API gravity below 10.0° (i.e., greater than 1000 kg/m3). This is because extra heavy oil is composed of mostly the heaviest hydrocarbons, such as asphaltenes and resins.
How to Calculate API Gravity?
API Gravity calculator uses API Gravity = (141.5/Specific Gravity)-131.5 to calculate the API Gravity, API gravity is defined as a measure of how heavy or light a petroleum liquid is compared to water. API Gravity is denoted by °API symbol.
How to calculate API Gravity using this online calculator? To use this online calculator for API Gravity, enter Specific Gravity (SG) and hit the calculate button. Here is how the API Gravity calculation can be explained with given input values -> 41.06098 = (141.5/0.82)-131.5.