StructCalc logo StructCalc
Construction Calculator

Build
with
Confidence.

The all-in-one calculator for stairs, rafters, walls, fencing & materials. Built for pros, on the job. Rafter length, stair stringers, baluster spacing, roof pitch, and right-angle verification — all solved instantly without manual math. Works fully offline.

Google Play App Store — Soon
StructCalc app home screen showing rafter calculator, stair calculator, square check, and framing tools
8+
Calculators
100%
Offline Ready
Pro
Grade Accuracy
What's Inside

Every tool
you need.

Stairs

Calculate risers, treads, stringers, and stair layouts with professional-grade accuracy. Handles any rise and run combo.

Rafters & Roof

Precise cuts for common, hip, and jack rafters. Pitch, run, rise — solved instantly without the trigonometry headache.

Walls Framing

Stud layout, plate lengths, and for raked walls in seconds. Perfect for rough framing on any build.

Material Lists

Auto-generate estimates for fencing, decking, flooring, and concrete. Save time, cut waste, reduce cost.

Browser Demos

Try the free
web calculators.

Need a quick number from the browser? Try a few StructCalc demo calculators, then install the Android app for the full jobsite workflow.

Rise + run

Stair calculator

Check total rise, tread rise, tread run, stair angle and layout options.

Open calculator Roof framing

Rafter calculator

Calculate common rafter length, roof pitch, rise, run and overhang.

Open calculator Layout check

Square check

Find the expected diagonal and compare it with your measured diagonal.

Open calculator
In Action

See it
work.

Designed for the job site — fast inputs, clear results, no fuss. Works fully offline. From roof framing and stair layouts to concrete estimates and baluster spacing, StructCalc handles the math so you can focus on the build.

Stair Calc
Stair calculator screenshot
Stairs
Rafter Calc
Rafter calculator screenshot
Rafters
Fencing Calc
Fence calculator screenshot
Fencing
Why StructCalc

Precision
every time.

  • 01 Advanced framing calculators built for professionals
  • 02 Simplifies complex carpentry math instantly
  • 03 Accurate layouts for foundations, roofs & stairs
  • 04 Optimized for speed and efficiency on the job site
  • 05 Works fully offline — no signal needed
  • 06 Supports Metric and Imperial units
Available Now

Download
Free

Start calculating smarter. Free on Android, iOS coming soon.

Get on Google Play