in⁴ to mm⁴ Converter (Inches⁴ to Millimeters⁴)
Convert cross-sectional moments of inertia (Ix, Iy) between AISC steel shapes and international metric profiles.
in⁴ to mm⁴ Conversion Formula
To convert any value in Inches to the Fourth (in⁴) (in⁴) to Millimeters to the Fourth (mm⁴) (mm⁴), multiply the quantity by the exact factor 416231.4256.
in⁴ to mm⁴ Conversion Chart
| in⁴ (Inches to the Fourth (in⁴)) | mm⁴ (Millimeters to the Fourth (mm⁴)) | Conversion Ratio |
|---|---|---|
| 10 in⁴ | 4162310 mm⁴ | 1 in⁴ = 416231.42560 mm⁴ |
| 50 in⁴ | 20811600 mm⁴ | 1 in⁴ = 416231.42560 mm⁴ |
| 100 in⁴ | 41623100 mm⁴ | 1 in⁴ = 416231.42560 mm⁴ |
| 200 in⁴ | 83246300 mm⁴ | 1 in⁴ = 416231.42560 mm⁴ |
| 500 in⁴ | 208116000 mm⁴ | 1 in⁴ = 416231.42560 mm⁴ |
| 800 in⁴ | 332985000 mm⁴ | 1 in⁴ = 416231.42560 mm⁴ |
| 1,000 in⁴ | 416231000 mm⁴ | 1 in⁴ = 416231.42560 mm⁴ |
| 1,500 in⁴ | 624347000 mm⁴ | 1 in⁴ = 416231.42560 mm⁴ |
| 2,000 in⁴ | 832463000 mm⁴ | 1 in⁴ = 416231.42560 mm⁴ |
| 3,000 in⁴ | 1248690000 mm⁴ | 1 in⁴ = 416231.42560 mm⁴ |
| 5,000 in⁴ | 2081160000 mm⁴ | 1 in⁴ = 416231.42560 mm⁴ |
| 10,000 in⁴ | 4162310000 mm⁴ | 1 in⁴ = 416231.42560 mm⁴ |
Structural Engineering Application
Moment of inertia measures a member's resistance to bending deflection. Because it is a fourth-power dimension, conversion factors are large: 1 in⁴ = 416,231 mm⁴ = 41.62 cm⁴ = 0.4162 × 10⁶ mm⁴.
Common Conversion Mistake
Confusing mm⁴ with cm⁴. In European catalogs, inertia is frequently printed in cm⁴ (1 cm⁴ = 10,000 mm⁴). Always verify magnitude.
Perform Full Structural Calculations in AXIS
Need to calculate section capacities, flexural reinforcement, or member buckling with these properties? AXIS runs instant ACI 318, AISC 360, and ASCE 7 checks with full step-by-step math derivations.