Convert Specific Gravity

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Convert Specific Gravity

Postby tskauffmani1 » Thu Jun 04, 2009 11:58 pm

Can Specific Gravity be converted to weight? if so, can you please explian in plain english.
Thanks
tskauffmani1
 

Re: Convert Specific Gravity

Postby Guest » Thu Jul 02, 2009 5:26 pm

tskauffmani1 wrote:Can Specific Gravity be converted to weight? if so, can you please explian in plain english.
Thanks


It can be converted to density which is the ratio of mass to volume.

Specific gravity is the ratio of a substance's density to the density of water. The density of water is actually slightly temperature dependent, but in the usual temperature range it is approximately 1 kg/L. So SG is approximately also the density in kilograms per liter. Because everything in metric is powers of ten, the density in units of kg/L, g/mL and t/m³ are numerically equal.

For higher accuracy, if you know the temperature at which SG was measured, you can look up the density of water and multiply by it as a correction.

To get to a known mass or weight, you will have to specify a volume and multiply by it.
As an example, the SG of gasoline (or density in kg/L) is about 0.75. The weight of gasoline in a 20 L jerrycan is about 15 kg.

(In Customary units, the conversion is a PITA)
Guest
 


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