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Density and Mass

lb/ft³toSG

Convert pounds per cubic foot (lb/ft³) to specific gravity (water) (SG).

Factor1 lb/ft³ = 0.01601846 SG

Converter

lb/ft³

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

Result
0.999552SG

Rendered to 6 significant figures.

Formula

Formula
SG = lb/ft³ × 0.01601846

Multiply any value in pounds per cubic foot by 0.01601846 to obtain the value in specific gravity (water).

Worked example

Convert 62.4 lb/ft³ to SG.

  1. 01Start with 62.4 lb/ft³.
  2. 02Multiply by the conversion factor: 62.4 × 0.01601846 = 0.999552 SG.
Result62.4 lb/ft³ = 0.999552 SG

Conversion table

lb/ft³SG
10.016018
20.032037
50.080092
100.16018
200.32037
500.80092
1001.6018
2003.2037
5008.0092
100016.018

Reference values rounded to 5 significant figures for display.

FAQ

What is the conversion factor from lb/ft³ to SG?
1 lb/ft³ equals 0.01601846 SG. To convert, multiply the value in pounds per cubic foot by 0.01601846.
How do I convert 1 lb/ft³ to SG?
1 lb/ft³ = 0.0160185 SG. For any value, multiply by 0.01601846.
How do I convert SG back to lb/ft³?
Divide by the same factor — or equivalently, multiply by 62.42796. So 1 SG = 62.428 lb/ft³.
When would I need to convert pound per cubic foot 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?
Yes. Both lb/ft³ and SG are defined by exact SI relationships, so the displayed factor is exact (any rounding shown is only for display).

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