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Density and Mass

lb/in³tokg/m³

Convert pounds per cubic inch (lb/in³) to kilograms per cubic metre (kg/m³).

Factor1 lb/in³ = 27679.9 kg/m³

Converter

lb/in³

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

Result
7861.09kg/m³

Rendered to 6 significant figures.

Formula

Formula
kg/m³ = lb/in³ × 27679.9

Multiply any value in pounds per cubic inch by 27679.9 to obtain the value in kilograms per cubic metre.

Worked example

Convert 0.284 lb/in³ to kg/m³.

  1. 01Start with 0.284 lb/in³.
  2. 02Multiply by the conversion factor: 0.284 × 27679.9 = 7861.09 kg/m³.
Result0.284 lb/in³ = 7861.09 kg/m³

Conversion table

lb/in³kg/m³
127680
255360
51.3840e+5
102.7680e+5
205.5360e+5
501.3840e+6
1002.7680e+6
2005.5360e+6
5001.384e+7
10002.768e+7

Reference values rounded to 5 significant figures for display.

FAQ

What is the conversion factor from lb/in³ to kg/m³?
1 lb/in³ equals 27679.9 kg/m³. To convert, multiply the value in pounds per cubic inch by 27679.9.
How do I convert 1 lb/in³ to kg/m³?
1 lb/in³ = 27679.9 kg/m³. For any value, multiply by 27679.9.
How do I convert kg/m³ back to lb/in³?
Divide by the same factor — or equivalently, multiply by 3.612729e-5. So 1 kg/m³ = 3.61273e-5 lb/in³.
When would I need to convert pound per cubic inch to kilogram per cubic metre?
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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