Moment of Inertia Calculator
Calculate the second moment of area and section modulus for rectangular and circular cross-sections.
How to Use the Moment of Inertia Calculator
- Enter width or diameter in mm.
- Enter height in mm (rectangle only).
- Select cross-section shape.
- Review moment of inertia and section modulus.
使用例
- •Beam design verification
- •Column cross-section analysis
- •Structural steel selection
計算式
Rectangle: I = bh³/12; Circle: I = πr⁴/4
よくある質問
How accurate is this calculator?
Results are based on standard engineering formulas and are suitable for preliminary estimates.
What units are used?
SI units (metres, kg, kPa) are used unless otherwise noted.
Is it free?
Yes, all calculators are completely free.