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Density and Mass

kg/m³tolb/in³

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

Factor1 kg/m³ = 3.612729e-5 lb/in³

Converter

kg/m³

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

Result
0.281793lb/in³

Rendered to 6 significant figures.

Formula

Formula
lb/in³ = kg/m³ × 3.612729e-5

Multiply any value in kilograms per cubic metre by 3.612729e-5 to obtain the value in pounds per cubic inch.

Worked example

Convert 7800 kg/m³ to lb/in³.

  1. 01Start with 7800 kg/m³.
  2. 02Multiply by the conversion factor: 7800 × 3.612729e-5 = 0.281793 lb/in³.
Result7800 kg/m³ = 0.281793 lb/in³

Conversion table

kg/m³lb/in³
13.6127e-5
27.2255e-5
50.00018064
100.00036127
200.00072255
500.0018064
1000.0036127
2000.0072255
5000.018064
10000.036127

Reference values rounded to 5 significant figures for display.

FAQ

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