Moment of Inertia / lb·ft² → kg·m²
Convert Pound square feet to Kilogram square meters
Convert mass moments of inertia used in rotational dynamics. Convert Pound square feet (lb·ft²) to Kilogram square meters (kg·m²). Find the formula, worked examples, unit definitions, and practical guidance below.
Reverse: Kilogram square meters to Pound square feet →
How to convert pound square feet to kilogram square meters
These units describe mass moment of inertia (mass times distance squared). Second moment of area uses length to the fourth power and belongs to a different quantity.
Use x for the value in lb·ft², b for the intermediate value in kg·m², and y for the result in kg·m².
kg·m² = lb·ft² × 0.042140110093804806
Worked examples
10 lb·ft² ≈ 0.421401100938 kg·m²
Step 1: (10 × 0.0421401100938) ≈ 0.421401100938 kg·m².
Step 2: 0.421401100938 ÷ 1 ≈ 0.421401100938 kg·m².20 lb·ft² ≈ 0.842802201876 kg·m²
Step 1: (20 × 0.0421401100938) ≈ 0.842802201876 kg·m².
Step 2: 0.842802201876 ÷ 1 ≈ 0.842802201876 kg·m².
Results are rounded to 12 significant digits. Converting units does not increase the precision of the original measurement. Very large or small values outside JavaScript’s finite numeric range are rejected.
About Pound square feet
Pound square feet (lb·ft²) measures moment of inertia under the conventions above. The base value in kg·m² is (x × 0.0421401100938), where x is the numerical value in lb·ft². Factors shown here are rounded for display; calculations use the stored factor.
About Kilogram square meters
Kilogram square meters (kg·m²) measures moment of inertia under the conventions above. The base value in kg·m² is (x × 1), where x is the numerical value in kg·m². Factors shown here are rounded for display; calculations use the stored factor.
Definitions and sources
Carry the same physical assumptions into subsequent physics calculations.
Pound square feet to kilogram square meters reference table
| Pound square feet (lb·ft²) | Kilogram square meters (kg·m²) |
|---|---|
| 1 | 0.0421401100938 |
| 5 | 0.210700550469 |
| 10 | 0.421401100938 |
| 25 | 1.05350275235 |
| 50 | 2.10700550469 |
| 100 | 4.21401100938 |
| 1000 | 42.1401100938 |
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