Specific Gravity Converter

Convert specific gravity to density in various units. Specific gravity is the ratio of a substance density to water density.

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SG

kg/m³

1,025.0

g/cm³1.0250
lb/ft³63.99
lb/gal8.554
View formula & how it works →

Specific Gravity

Specific Gravity = Density of Substance / Density of Water

Since water density is 1 g/cm³ (or 1000 kg/m³ at 4°C), specific gravity is numerically equal to density in g/cm³.

Quick Conversions

  • kg/m³ = SG x 1,000
  • g/cm³ = SG x 1
  • lb/ft³ = SG x 62.428
  • lb/gal = SG x 8.345

    • Example Calculation

    Convert SG 1.025 (seawater).

    1. 01kg/m³ = 1.025 x 1000 = 1025
    2. 02g/cm³ = 1.025
    3. 03lb/ft³ = 1.025 x 62.428 = 63.99
    4. 04lb/gal = 1.025 x 8.345 = 8.554

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