JoistLogic: Construction Calc

Machinist Apps

In-app purchases

About this app

JoistLogic is a professional construction calculator app built for carpenters, builders, and serious DIY users who need fast, accurate jobsite math.

Get powerful tools for everyday framing and layout work, including wall framing, joist layout, roof/rafter calculations, stair calculations, feet-and-inches math, and more. Built-in visual plotting helps you understand geometry clearly before you cut, reducing mistakes and saving time.

Key features:

* Construction-focused calculators for framing, stairs, rafters, and layout
* Feet, inches, and fraction-based workflows
* Visual diagrams for clearer planning and mark-out
* Fast, practical results designed for real field use
* Clean interface optimized for quick input and review

JoistLogic includes free tools plus premium features for advanced workflows. Subscription options unlock enhanced functionality for users who want pro-level capabilities.

Whether you are estimating, laying out, or double-checking dimensions in the shop or on site, JoistLogic helps you work faster and with more confidence.