StructCalc was created to put professional-grade construction math in your pocket — fast, accurate, and fully offline.
StructCalc was created out of the daily friction of jobsite math: laying out stairs meant a beat-up standalone calculator or an ad-stuffed phone app, and neither was built for the trades. Every tool here starts from a real site question — how many risers fit this rise, how long is that common rafter, where do the balusters land.
The calculators are verified against the same core logic that powers the Android app, work in feet-inch fractions and metric, and run fully offline. Clean inputs, clear results, no distractions — the best tool is the one that gets out of your way.
Your projects live on your phone, not in a cloud. No account, no uploads, no worries about connectivity.
Every calculator was designed with real-world framing, roofing, and stair-building workflows in mind.
We add tools and refinements based on what users actually need on the job. Feedback drives every update.