Section PropertiesHigh-Precision Engineering Formula
in³ to mm³ Converter (Inches³ to Millimeters³)
Convert plastic section modulus (Zx, Zy) and elastic section modulus (Sx, Sy) from in³ to mm³.
Interactive Conversion EngineSwap: mm³ → in³
Cubic Inches (in³)
in³
Result (mm³)Cubic Millimeters (mm³)
Standard Engineering Presets
in³ to mm³ Conversion Formula
To convert any value in Cubic Inches (in³) (in³) to Cubic Millimeters (mm³) (mm³), multiply the quantity by the exact factor 16387.064.
in³ to mm³ Conversion Chart
| in³ (Cubic Inches (in³)) | mm³ (Cubic Millimeters (mm³)) | Conversion Ratio |
|---|---|---|
| 5 in³ | 81935.3 mm³ | 1 in³ = 16387.06400 mm³ |
| 10 in³ | 163871 mm³ | 1 in³ = 16387.06400 mm³ |
| 20 in³ | 327741 mm³ | 1 in³ = 16387.06400 mm³ |
| 30 in³ | 491612 mm³ | 1 in³ = 16387.06400 mm³ |
| 50 in³ | 819353 mm³ | 1 in³ = 16387.06400 mm³ |
| 75 in³ | 1229030 mm³ | 1 in³ = 16387.06400 mm³ |
| 100 in³ | 1638710 mm³ | 1 in³ = 16387.06400 mm³ |
| 150 in³ | 2458060 mm³ | 1 in³ = 16387.06400 mm³ |
| 200 in³ | 3277410 mm³ | 1 in³ = 16387.06400 mm³ |
| 300 in³ | 4916120 mm³ | 1 in³ = 16387.06400 mm³ |
| 500 in³ | 8193530 mm³ | 1 in³ = 16387.06400 mm³ |
Design Context
Structural Engineering Application
Plastic section modulus Z directly dictates a beam's nominal plastic bending capacity: Mp = Fy * Z. 1 in³ = 16,387 mm³ = 16.387 cm³.
Engineering Pitfall
Common Conversion Mistake
Confusing elastic modulus S (yield moment My = Fy * S) with plastic modulus Z (fully plastic moment Mp = Fy * Z). Z is typically 10–15% larger than S for I-shapes.
Direct Tool Integration
Steel Beam Designer→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.