Weight Calculation Formula:
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Specific gravity (SG) is the ratio of the density of a substance to the density of water. For food products, this conversion helps determine weight from volume measurements, which is particularly useful in recipe scaling and nutritional calculations.
The calculator uses the simple formula:
Where:
Explanation: Since 1 cm³ of water weighs 1 gram, multiplying volume by specific gravity gives the weight of any substance relative to water.
Details: Knowing specific gravity is essential for accurate recipe formulation, nutritional labeling, and industrial food production where precise measurements are crucial.
Tips: Enter volume in cm³ (1 mL = 1 cm³) and the specific gravity of your food product. Common food SGs: honey ~1.42, milk ~1.03, vegetable oil ~0.92.
Q1: How do I find specific gravity of a food?
A: Measure weight of known volume, or consult food science references. For liquids, a hydrometer can measure SG directly.
Q2: Does temperature affect specific gravity?
A: Yes, SG measurements should specify temperature (usually 20°C/68°F is standard).
Q3: Can I use this for irregularly shaped foods?
A: Yes, if you can measure the volume (e.g., via water displacement) and know the SG.
Q4: What's the difference between density and specific gravity?
A: Density has units (g/cm³), while SG is dimensionless (ratio to water's density at specified temperature).
Q5: How accurate is this calculation?
A: Very accurate if precise volume and SG values are used. Error comes mainly from measurement inaccuracies.