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lbf⋅in⋅s2\text{lbf}{\cdot}\text{in}{\cdot}\text{s}^{2}

pound-force inch second squared

Moment of inertiaexact by definition

The pound-force inch second squared is exactly 0.1129848290276167 kg·m². It looks strange until you notice that lbf·s²/in is a mass and multiplying by inches gives an inertia; it is the inch-based cousin of the slug square foot.

Watch out: The mass unit behind it, lbf·s²/in, is sometimes called the "blob" or "slinch" and is twelve slugs. It appears in US machine design texts working entirely in inches, and it is a reliable source of factor-of-twelve errors.

1 lbf⋅in⋅s2\text{lbf}{\cdot}\text{in}{\cdot}\text{s}^{2} 0.11298483 kg⋅m2\text{kg}{\cdot}\text{m}^{2}

One pound-force inch second squared in every moment of inertia unit

1,129,850gram square centimeter (g·cm²)
112,985kilogram square millimeter (kg·mm²)
6,177.42ounce square inch (oz·in²)
1,129.85kilogram square centimeter (kg·cm²)
386.089pound square inch (lb·in²)
112.985gram square meter (g·m²)
2.68117pound square foot (lb·ft²)
1pound-force inch second squared (lbf·in·s²)this unit
0.112985kilogram square meter (kg·m²)
0.0833333slug square foot (slug·ft²)
0.0833333pound-force foot second squared (lbf·ft·s²)
0.000112985tonne square meter (t·m²)
Solvers that use moment of inertia

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