We just open-sourced our entire calculator suite: 42 construction
calculators under MIT license. React + TypeScript + Tailwind.

🔗 Repo: github.com/estimatorsuite/construction-calculators
🔗 Live: estimatorsuite.github.io/construction-calculators/
🔗 npm: @estimatorsuite/calculators

What's included:
• 36 material calculators (concrete volume, roofing squares,
drywall, paint, flooring, etc.)
• 6 trade estimators (HVAC load, electrical conduit fill,
plumbing pipe sizing)

Two entry points:
→ React components — drop into any project
→ Pure calculation functions — zero UI dependency, works in
Node.js, Vite, Next.js, anywhere

Why we built this:
Construction software is expensive. Contractors told us they
needed free tools that actually work — not ad-filled spreadsheets.
So we built them, and we open-sourced them.

Full story →