Cross Section Calculator

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.