Specific Gravity Practice Problems
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Specific gravity relates a liquid's weight to its volume, letting you convert between grams and milliliters — needed when a formula is given by weight but measured by volume, or vice versa.
Formulaspecific gravity = weight (g) ÷ volume (mL) → weight = volume × SG • volume = weight ÷ SG
Worked example
Glycerin has a specific gravity of 1.25. The weight of 240 mL = 240 × 1.25 = 300 g.
💡 Numerically, SG equals grams per mL because it's referenced to water (1 g/mL).