Moment of inertia (rotational inertia) determines how difficult it is to change an object's rotation speed. This tool converts values between various metric and imperial units.

1. Enter Value

Type the numerical value you wish to convert.

2. Select Units

• From: Choose the starting unit (e.g., kg·m²).
• To: Choose the target unit (e.g., lb·ft²).

3. Result

The conversion is calculated instantly.

• Metric:
• kilogram square meter (kg·m²) - The SI unit.
• kilogram square centimeter (kg·cm²)
• kilogram square millimeter (kg·mm²)
• gram square centimeter (g·cm²)
• Imperial:
• pound square foot (lb·ft²)
• pound square inch (lb·in²)
• ounce square inch (oz·in²)
• slug square foot (slug·ft²)

Different industries use different standards.

• Physics: Uses standard SI units (kg·m²).
• Engineering (US): Often uses lb·ft² or slug·ft².
• Small Machinery: May use smaller units like g·cm² or oz·in².

Our converter handles precise conversion factors.

• 1 lb·ft² ≈ 0.04214 kg·m²
• 1 slug·ft² ≈ 1.3558 kg·m²