Quick reference table
Common moment of inertia conversions
| From | To |
|---|---|
| 1 lb·ft² | 0.04214011009 kg·m² |
| 1 kg·m² | 23.73036040 lb·ft² |
| 1 g·cm² | 1 × 10⁻⁷ kg·m² |
| 1 lb·in² | 2.926396534 kg·cm² |
How to convert moment of inertia
Moment of inertia tells how hard it is to change the rotation of an object. It depends on both mass and how far the mass is from the axis.
Every moment of inertia unit is a fixed multiple of one base unit, the kg·m². To convert a value, multiply it by the size of the starting unit and divide by the size of the target unit. For example, to convert lb·ft² to kg·m², multiply by 0.04214011009. To go the other way, divide by 0.04214011009.
The converter above does this for you and shows the exact formula under the result.
Worked examples
Pound square feet to Kilogram square meters
| Pound square feet (lb·ft²) | Kilogram square meters (kg·m²) |
|---|---|
| 1 lb·ft² | 0.04214011009 kg·m² |
| 2 lb·ft² | 0.08428022019 kg·m² |
| 5 lb·ft² | 0.2107005505 kg·m² |
| 10 lb·ft² | 0.4214011009 kg·m² |
| 25 lb·ft² | 1.053502752 kg·m² |
| 50 lb·ft² | 2.107005505 kg·m² |
| 100 lb·ft² | 4.214011009 kg·m² |
| 1,000 lb·ft² | 42.14011009 kg·m² |
Kilogram square meters to Pound square feet
| Kilogram square meters (kg·m²) | Pound square feet (lb·ft²) |
|---|---|
| 1 kg·m² | 23.73036040 lb·ft² |
| 2 kg·m² | 47.46072081 lb·ft² |
| 5 kg·m² | 118.6518020 lb·ft² |
| 10 kg·m² | 237.3036040 lb·ft² |
| 25 kg·m² | 593.2590101 lb·ft² |
| 50 kg·m² | 1,186.518020 lb·ft² |
| 100 kg·m² | 2,373.036040 lb·ft² |
| 1,000 kg·m² | 23,730.36040 lb·ft² |
Moment of inertia units explained
| Unit | Symbol | Equals |
|---|---|---|
| Kilogram square meters | kg·m² | 1 kg·m² = 1 kg·m² |
| Gram square centimeters | g·cm² | 1 g·cm² = 1 × 10⁻⁷ kg·m² |
| Gram square millimeters | g·mm² | 1 g·mm² = 1 × 10⁻⁹ kg·m² |
| Kilogram square centimeters | kg·cm² | 1 kg·cm² = 0.0001 kg·m² |
| Pound square feet | lb·ft² | 1 lb·ft² = 0.0421401100938 kg·m² |
| Pound square inches | lb·in² | 1 lb·in² = 0.00029263965342 kg·m² |
| Ounce square inches | oz·in² | 1 oz·in² = 0.0000182899783 kg·m² |
| Slug square feet | slug·ft² | 1 slug·ft² = 1.35581794833 kg·m² |
Popular conversions: lb ft2 to kg m2.
Frequently asked questions
How many kg·m² is 1 lb·ft²?
One pound square foot is about 0.04214 kg·m².
How do I convert lb·ft² to kg·m²?
Multiply the value in lb·ft² by 0.04214011009 to get kg·m². For example, 10 lb·ft² = 0.4214011009 kg·m².
How many kg·m² is 1 lb·ft²?
1 lb·ft² = 0.04214011009 kg·m², and 1 kg·m² = 23.73036040 lb·ft².
Does this moment of inertia converter work offline?
Yes. After the page has loaded once, all calculations run in your browser, so it keeps working without an internet connection.