API Gravity Solution

STEP 0: Pre-Calculation Summary
Formula Used
API Gravity = (141.5/Specific Gravity)-131.5
°API = (141.5/SG)-131.5
This formula uses 2 Variables
Variables Used
API Gravity - API gravity is defined as a measure of how heavy or light a petroleum liquid is compared to water.
Specific Gravity - Specific Gravity is defined as a measure of the density of a substance in comparison to the density of a reference material.
STEP 1: Convert Input(s) to Base Unit
Specific Gravity: 0.82 --> No Conversion Required
STEP 2: Evaluate Formula
Substituting Input Values in Formula
°API = (141.5/SG)-131.5 --> (141.5/0.82)-131.5
Evaluating ... ...
°API = 41.0609756097561
STEP 3: Convert Result to Output's Unit
41.0609756097561 --> No Conversion Required
FINAL ANSWER
41.0609756097561 41.06098 <-- API Gravity
(Calculation completed in 00.004 seconds)

Credits

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Created by Harsh Kadam
Shri Guru Gobind Singhji Institute of Engineering and Technology (SGGS), Nanded
Harsh Kadam has created this Calculator and 50+ more calculators!
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Verified by Prerana Bakli
University of Hawaiʻi at Mānoa (UH Manoa), Hawaii, USA
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Basics of Petrochemicals Calculators

Viscosity Index Mixture
​ LaTeX ​ Go Viscosity Index = ((Aromatic's Viscosity-Lube Oil Viscosity)/(Aromatic's Viscosity-Paraffinic Viscosity))*100
Aniline Point
​ LaTeX ​ Go Diesel Aniline Point = (Diesel Index*100)/API Gravity
Saybolt Method Viscosity
​ LaTeX ​ Go Saybolt Method Viscosity = (0.219*Time)-(149.7/Time)
API Gravity
​ LaTeX ​ Go API Gravity = (141.5/Specific Gravity)-131.5

API Gravity Formula

​LaTeX ​Go
API Gravity = (141.5/Specific Gravity)-131.5
°API = (141.5/SG)-131.5

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.

FAQ

What is API Gravity?
API gravity is defined as a measure of how heavy or light a petroleum liquid is compared to water and is represented as °API = (141.5/SG)-131.5 or API Gravity = (141.5/Specific Gravity)-131.5. Specific Gravity is defined as a measure of the density of a substance in comparison to the density of a reference material.
How to calculate API Gravity?
API gravity is defined as a measure of how heavy or light a petroleum liquid is compared to water is calculated using API Gravity = (141.5/Specific Gravity)-131.5. To calculate API Gravity, you need Specific Gravity (SG). With our tool, you need to enter the respective value for Specific Gravity and hit the calculate button. You can also select the units (if any) for Input(s) and the Output as well.
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