Moment of Inertia Converter
Convert between kg·m², lb·ft², and other moment of inertia units.
1 kg·m² = 23.73036 lb·ft²
About the moment of inertia converter
Convert moment of inertia between kg·m² (SI), lb·ft², lb·in², and slug·ft². Moment of inertia (also called rotational inertia) measures an object’s resistance to angular acceleration about a given axis — essential for analyzing flywheels, rotors, and rigid-body dynamics.
Frequently asked questions
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How many kg·m² is 1 lb·ft²?
One pound-foot squared equals approximately 0.04214 kg·m².
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How is moment of inertia different from torque?
Moment of inertia is a property of a body (mass distribution about an axis); torque is the rotational equivalent of force applied to it. They are related by τ = Iα.
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What is a slug-foot squared?
It uses the slug, the imperial unit of mass. 1 slug·ft² ≈ 1.3558 kg·m² — sometimes seen in US aerospace and automotive engineering.
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What is the SI unit of moment of inertia?
The kilogram-meter squared (kg·m²).
More engineering converters
Complete list of moment of inertia units
- Kilogram·meter² [kg·m²]
- 1 Pound·foot² [lb·ft²] = 0.042140110093805 Kilogram·meter² to Kilogram·meter² · from Kilogram·meter²