# Section Properties > Calculate section properties instantly for different shapes of profiles. Free online structural engineering tools with precise results. > Generated by All in One SEO v5.0.3, this is an llms.txt file, used by LLMs to index the site. ## Sitemaps - [XML Sitemap](https://sectprops.com/sitemap.xml): Contains all public & indexable URLs for this website. ## Pages - [Calculators](https://sectprops.com/): Calculate section properties instantly for different shapes of profiles. Free online structural engineering tools with precise results. - [Rectangular Hollow Section Properties Calculator](https://sectprops.com/rhs-2/): Build custom RHS section profiles with free interactive tools. Calculate core properties like moment of inertia, section modulus, and area instantly. - [Thin-walled Section Properties Calculator](https://sectprops.com/thin-walled-section/): Build custom thin-walled section profiles with free interactive tools. Calculate core properties like moment of inertia, section modulus, and area instantly. - [Circular Hollow Section Properties Calculator](https://sectprops.com/chs-2/): Build custom CHS section profiles with free interactive tools. Calculate core properties like moment of inertia, section modulus, and area instantly. - [About](https://sectprops.com/about/): Welcome to SectProps.com, a dedicated online resource for calculating properties of section profiles. The platform provides quick, browser-based calculators to calculate different properties for common section profiles, as well as for generic thin-walled sections, in an easy and intuitive way. I created SectProps.com to make it easier and quicker to find structural properties of profiles. - [L Section Properties Calculator](https://sectprops.com/l-section/): Build custom L section profiles with free interactive tools. Calculate core properties like moment of inertia, section modulus, and area instantly. - [Z Section Properties Calculator](https://sectprops.com/z-section/): Build custom Z section profiles with free interactive tools. Calculate core properties like moment of inertia, section modulus, and area instantly. - [I Section Properties Calculator](https://sectprops.com/i-section/): Build custom I section profiles with free interactive tools. Calculate core properties like moment of inertia, section modulus, and area instantly. - [C-Section Properties Calculator](https://sectprops.com/c-section/): Build custom C section profiles with free interactive tools. Calculate core properties like moment of inertia, section modulus, and area instantly. - [Contact](https://sectprops.com/contact/): Contact Have a question about a structural concept, spotted an error, or just want to say hello? Feel free to reach out at: sectprops@gmail.com - [Terms and Conditions](https://sectprops.com/terms-and-conditions/): Terms and Conditions Last updated: August 29, 2026 Please read these Terms and Conditions (“Terms”) carefully before using SectProps.com (the “Website”, “Service”, “we”, “us”, or “our”). By accessing or using the Website, you agree to these Terms. If you do not agree with these Terms, please do not use the Website. 1. Use of the - [Privacy Policy](https://sectprops.com/privacy-policy/): Privacy Policy Last updated: August 29, 2026 SectProps.com is a free website providing online calculators and information relating to structural section properties and engineering. We respect your privacy and aim to collect as little information as possible. 1. Information We Collect SectProps.com does not require visitors to create an account or provide personal information in - [Formulas](https://sectprops.com/formulas/)