Browse Code
OpenTakeoff is a free, Apache-2.0 quantity takeoff tool for construction estimating.
Open a plan set (PDF, image or .zip), set the drawing scale, and measure - area, linear, count and deduct - with one-click room detection that traces a room when you click inside it. Apply waste percentages and supporting materials, then export quantities (SF, SY, LF, EA) as CSV or JSON.
It runs entirely in your browser: no account, no upload, no server. Plans never leave your machine.
What makes it different is who can run it. A person clicks the canvas; an AI agent calls the identical engine over the Model Context Protocol (npx opentakeoff-mcp, 35 tools) and gets the identical number, with the scale and origin of every measurement recorded.
Built for Division 9 flooring by a working estimator, but the engine is general - drywall, paint, concrete, sitework.
A free alternative to subscription takeoff tools such as STACK, PlanSwift, Bluebeam, Kreo and Togal.
Features
- One-click room detection - click inside a room and it traces itself
- Drivable by an AI agent over MCP - npx opentakeoff-mcp, 35 tools
- Runs fully in your browser - no account, no upload, plans stay local
- Area, linear, count and deduct with drawing-scale calibration
- Export quantities to CSV or JSON with per-measurement provenance
- Apache-2.0 - self-host with one npm run build on any static host
Project Samples
