Free construction contractor tools

CalcForge's contractor tools cover the day-to-day calculations a site team needs outside the main structural or geotechnical design. The Concrete Mix & Formwork calculator turns a pour height, temperature and mix design into an estimated formwork and falsework solution, and the Scaffold Design calculator builds a scaffold from supplier products and can run a 2D frame analysis on it in one click. The Slope Gradient calculator converts between percentage, ratio and angle for earthworks or drainage falls, and the Roof Pitch calculator finds rafter length and pitch-to-degree conversions for a building roof. Wind Force estimates wind speed and the resulting pressure on a structure, and the Kinetic Friction calculator solves the standard friction force equation for sliding loads. All six tools are free, open source, and need no sign-up to use.

Yes. Every tool linked from this page runs a free calculation with no sign-up required. Creating a free account additionally lets you save a design and, on most calculators, export a PDF report — a small number of deeper analysis features are reserved for a paid tier, noted on that calculator's own page.

You don't need to be a developer to publish one. Our Python for Civil Engineering certification (enrol here) walks you through building and publishing four tools like the ones on this page, using the same open-source engineering libraries CalcForge itself is built on.