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Density and Mass

kg/m³toSG

Convert kilograms per cubic metre (kg/m³) to specific gravity (water) (SG).

Factor1 kg/m³ = 0.001 SG

Converter

kg/m³

Accepts numbers or expressions, e.g. 150 + 14.7

Result
0.998SG

Rendered to 6 significant figures.

Formula

Formula
SG = kg/m³ × 0.001

Multiply any value in kilograms per cubic metre by 0.001 to obtain the value in specific gravity (water).

Worked example

Convert 998 kg/m³ to SG.

  1. 01Start with 998 kg/m³.
  2. 02Multiply by the conversion factor: 998 × 0.001 = 0.998 SG.
Result998 kg/m³ = 0.998 SG

Conversion table

kg/m³SG
10.001
20.002
50.005
100.01
200.02
500.05
1000.1
2000.2
5000.5
10001

Reference values rounded to 5 significant figures for display.

FAQ

What is the conversion factor from kg/m³ to SG?
1 kg/m³ equals 0.001 SG. To convert, multiply the value in kilograms per cubic metre by 0.001.
How do I convert 1 kg/m³ to SG?
1 kg/m³ = 0.001 SG. For any value, multiply by 0.001.
How do I convert SG back to kg/m³?
Divide by the same factor — or equivalently, multiply by 1000. So 1 SG = 1000 kg/m³.
When would I need to convert kilogram per cubic metre to specific gravity (water)?
Density conversions are critical for fluid property datasheets, hydraulic head calculations, and reconciling lab measurements (often g/cm³) with process simulator inputs (kg/m³).
Is the conversion exact?
The factor shown is precise to at least 7 significant figures. For most process-engineering work this is far better than instrument accuracy. For metrology or trade applications, refer to the relevant national standard (NIST, BIPM, ISO 80000).

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