Specific Gravity Calculator

Calculate the specific gravity (relative density) of a substance.

Input Parameters

Substance Density (ρ_sub) (kg/m³)

Reference Density (ρ_ref) (kg/m³)

Calculation Results

Enter parameters to calculate

About this calculator

Quick Reference

ρ_subSubstance Density

ρ_refReference (usually water)

1000 kg/m³Density of freshwater

1025 kg/m³Density of seawater

Overview

Specific gravity is the ratio of the density of a substance to the density of a reference substance (usually water for liquids and solids).

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Pro Tips

Fun Facts

"Gold has an SG of 19.3, making it incredibly dense."
"Cork has an SG of about 0.24, which is why it floats so well."
"In the oil industry, API gravity is used instead, which is inversely related to specific gravity."

Formula: SG = ρ_substance / ρ_water