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Density and Mass

lb/gal (UK)toSG

Convert pounds per imperial gallon (lb/gal (UK)) to specific gravity (water) (SG).

Factor1 lb/gal (UK) = 0.09977637 SG

Converter

lb/gal (UK)

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

Result
0.997764SG

Rendered to 6 significant figures.

Formula

Formula
SG = lb/gal (UK) × 0.09977637

Multiply any value in pounds per imperial gallon by 0.09977637 to obtain the value in specific gravity (water).

Worked example

Convert 10 lb/gal (UK) to SG.

  1. 01Start with 10 lb/gal (UK).
  2. 02Multiply by the conversion factor: 10 × 0.09977637 = 0.997764 SG.
Result10 lb/gal (UK) = 0.997764 SG

Conversion table

lb/gal (UK)SG
10.099776
20.19955
50.49888
100.99776
201.9955
504.9888
1009.9776
20019.955
50049.888
100099.776

Reference values rounded to 5 significant figures for display.

FAQ

What is the conversion factor from lb/gal (UK) to SG?
1 lb/gal (UK) equals 0.09977637 SG. To convert, multiply the value in pounds per imperial gallon by 0.09977637.
How do I convert 1 lb/gal (UK) to SG?
1 lb/gal (UK) = 0.0997764 SG. For any value, multiply by 0.09977637.
How do I convert SG back to lb/gal (UK)?
Divide by the same factor — or equivalently, multiply by 10.02241. So 1 SG = 10.0224 lb/gal (UK).
When would I need to convert pound per imperial gallon 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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