API Gravity

API gravity express the gravity or density for liquid petroleum products

API gravity express the gravity or density for liquid petroleum products. API is devised jointly by the American Petroleum Institute and the NIST - National Institute of Standards and Technology. The measuring scale is calibrated in terms of degrees API.

  • Oil with the least specific gravity has the highest API gravity
Degree APISpecific GravityWeight 
(lb/US gal)(kg/m3)
8 1.014 8.448 1012
9 1.007 8.388 1005
10 1.000 8.328 998
15 0.966 8.044 964
20 0.934 7.778 932
25 0.904 7.529 902
30 0.876 7.296 874
35 0.850 7.076 848
40 0.825 6.870 823
45 0.802 6.675 800
50 0.780 6.490 778
55 0.759 6.316 757
58 0.747 6.216 745

API Gravity can be calculated as:

API = (141.5 / SG) - 131.5        (1)

where

API = Degrees API Gravity

SG = Specific Gravity (at 60oF)

Related Topics

  • Combustion - Boiler house topics - fuels like oil, gas, coal, wood - chimneys, safety valves, tanks - combustion efficiency

Related Documents

Tag Search

Search the Engineering ToolBox

- "Search is the most efficient way to navigate the Engineering ToolBox!"

Engineering ToolBox - SketchUp Extension - Online 3D modeling!

3D Engineering ToolBox Extension to SketchUp - add parametric components to your SketchUp model

Add standard and customized parametric components - like flange beams, lumbers, piping, stairs and more - to your SketchUp model with the Engineering ToolBox - SketchUp Extension/Plugin - enabled for use with the amazing, fun and free SketchUp Make and SketchUp Pro . Add the Engineering ToolBox extension to your SketchUp from the Sketchup Extension Warehouse!

Translate the Engineering ToolBox!
About the Engineering ToolBox!

Support the ToolBox

If you find the Engineering ToolBox useful and want this website to be available tomorrow - and the days after tomorrow - enable ads or make a contribution!

Contribute to the Engineering ToolBox

close