Stair Calculator .

Build stairs with confidence using Stair Calculator, a professional construction tool designed for carpenters, contractors, deck builders, and DIY renovators.

Whether you need a stair stringer calculator, a stair tread calculator, or a stair rise and run calculator, this app helps you quickly plan accurate stair dimensions from a few simple inputs. Enter the total rise, target riser height, and tread depth to get instant results for step count, exact riser height, total run, stair angle, and stringer length.

Stair Calculator is built for real jobsite use with large controls, clear results, and visual previews that make layout easier to understand.

Core Features:

Stair step calculator for fast stair planning
Stair rise and run calculator with instant dimension updates
Stair stringer calculator for accurate stringer length output
Stair calculator with diagram for quick visual understanding
Elevation, plan, and interactive 3D stair previews
Metric and imperial support
Outdoor-friendly, clean professional interface

Use It For:

Deck stairs calculator projects
Interior stair planning
Stair calculator with landing layouts
Spiral staircase calculator needs
Measuring stairs before cutting or building
Figuring stair stringers on-site
Calculating stringers for stairs during planning and framing
Calculate stringer for steps with faster workflow
General stairs computation for residential projects


Calculated Results:

Number of steps
Number of treads
Exact riser height
Tread depth
Total run
Stair angle
Stringer length
Visual Preview Tools

See your stair in multiple ways:

Elevation preview for straight stairs
Plan preview for landing and turning stairs
Interactive 3D preview for better visualization
Full-screen preview mode for detailed inspection


Pro Features:

Upgrade to unlock advanced workflow tools:

L-shape stairs
U-shape stairs
Spiral stairs
PDF export
Project history
Adjustable tread thickness
Stringer cut diagram
Ad-free experience


Stair Calculator helps simplify measuring stairs, planning layouts, and checking dimensions before you cut. From deck builds to interior renovations, it gives you the fast answers you need in a format that is easy to read and easy to trust.


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Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/