Convert pound square foot to kilogram square meter instantly. Type in either field — results update live.
Selected lb·ft² values converted to kg·m² using the exact factor from this tool.
| lb·ft² | kg·m² |
|---|---|
| 0.01 | 0.0004214011 |
| 0.1 | 0.004214011 |
| 1 | 0.04214011 |
| 2 | 0.08428022 |
| 3 | 0.12642033 |
| 5 | 0.21070055 |
| 10 | 0.4214011 |
| 20 | 0.8428022 |
| 50 | 2.1070055 |
| 100 | 4.214011 |
| 1,000 | 42.14011 |
Exact conversion factors in both directions, plus a worked example.
1 lb·ft² = 0.04214011 kg·m²
1 kg·m² = 23.7303604571 lb·ft²
To convert pound square foot to kilogram square meter, multiply by 0.04214011.
To convert kilogram square meter to pound square foot, multiply by 23.7303604571.
Example: convert 10 lb·ft² to kg·m²
10 × 0.04214011 = 0.4214011 kg·m²
Short background on the units used in this conversion.
The pound square foot (lb·ft²) is an imperial moment of inertia unit — mass in pounds times the square of the distance in feet from the axis.
Pound square feet appear on US machinery specs, vehicle dynamics references, and legacy mechanical engineering handbooks.
The kilogram square meter (kg·m²) is the SI unit of moment of inertia — rotational mass resistance about an axis, in kg times m².
Kilogram square meters describe flywheels, rotating machinery, and structural dynamics in SI engineering calculations.
kg·m² = lb·ft² × 0.04214011lb·ft² = kg·m² × 23.7303604571, using the same exact factors as this converter.Jump to any moment of inertia conversion starting from pound square foot — including the reverse direction and every other unit in our dataset.