Free construction tools

Free construction tools for heavy civil

Browser tools you can use without a license seat: trench and pipe calculators, plan takeoff, proposal and schedule helpers, bid exports, and free construction AI. Built for underground utility and heavy civil work.

Open tools hub Calculators Try mud1 free

Tools on openmud

Construction calculators — trench volume, OSHA trench safety, pipe flow, markup, production, change order math, and more.
Free takeoff (web) — calibrate plans, measure LF/area/counts, OCR search on PDFs.
Estimating and docs — quick bid, proposal generator, schedule builder, bid finder.
Free construction AI (mud1) — chat that runs workflows and exports Bid2Win / HCSS / CSV.
Field resources — OSHA excavation, 811 / Blue Stakes, AI guides, tool directory.
Construction wiki — dictionary and workflows for estimating, earthwork, utilities, and PM.

Also from the same builder

Construction Takeoff (macOS) — plan markup and measure.
Swift Stakes (iOS) — 811 / Blue Stakes ticket help for UT and nearby states.
Construction Docs (macOS) — estimates and bid documents.

Why these are free

openmud is an open-source project for contractors. The goal is practical tools that save time on real jobs — not locked demos. Use them in the browser; contribute on GitHub if something is wrong or missing.