Cross Section Calculator

Cross section calculator: area, inertia, modulus, neutral axis

Cross Section Calc is a free structural engineering app for quickly checking and exploring cross-section properties.
By entering dimensions, you can instantly calculate section area, second moment of area (moment of inertia), section modulus, and neutral axis position.

The app also includes a powerful reverse calculation feature that determines the minimum required dimensions from a target section modulus (Z) or moment of inertia (I).
This makes it easy to search for efficient cross-sections that satisfy required performance values.

Designed for both engineering education and practical design studies, the app provides a simple and intuitive workflow.
It is lightweight, fast, and fully usable offline.

■ Key Features
• Tap to select cross-section shapes
• Supports 27 section types including rectangular, circular, I-shape, H-shape, T-shape, and more
• Create custom composite sections by combining rectangles
• Save section data
• Instant calculation results while entering dimensions
- Section area
- Second moment of area (moment of inertia)
- Section modulus
- Neutral axis position
• Reverse calculation from required section modulus (Z)
• Reverse calculation from required moment of inertia (I)
• Helps find minimum cross-section dimensions that satisfy required performance
• Input units: mm / in
• Output units: mm / cm / m / in / ft
• Offline support
• Lightweight and fast performance
• Free app with ads

■ How to Use
1. Select a cross-section shape
2. Enter dimensions or required performance values
3. View results instantly

■ Disclaimer
Calculation results provided by this app are for reference purposes only.
While efforts have been made to ensure accuracy, completeness, and suitability are not guaranteed.
Consult a qualified professional for critical design decisions.
The developer assumes no responsibility for any damages resulting from use of this app.