The specific gravity of a substance is a comparison of its density to that of water. This may also be referred to as relative density.
1 gallon of water weighs 8.33 lbs.
To figure the specific gravity of a substance take the number of pounds per gallon the substance weighs and divide it by 8.
Example: A gallon of oil weighs 9.5 lbs per gallon
9.5 lbs / 8 = 1.187 specific gravity
Title: How do you Measure Specific Gravity?
Description: A formula for figuring the specific gravity of a substance.
Published: 10/22/2007
Last Edited: 1/17/2023
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