EXAMPLE LAYOUT108″ riseFull side view · 165″ total run
APP SCREEN / EXAMPLE
VIDEO WALKTHROUGH
See the tool in action.
Watch how stair calculator works in the Build Specs app.
WHY IT’S USEFUL
Stair mistakes repeat across every step. Seeing the full layout—and the exact cumulative stringer marks—helps catch a bad assumption before it becomes a stack of mismatched risers.
WHAT IT DOES
Useful detail without the spreadsheet.
01
Practical stair geometry
Set total rise, tread depth, tread thickness, and top-attachment style, then calculate the complete flight.
02
Exact fractions
Read buildable fractional dimensions instead of translating decimal results on the jobsite.
03
Stringer layout
Use the rotated cut-layout diagram and cumulative diagonal marks to transfer the pattern consistently.
USE IT WHEN
The answer needs to travel with the work.
✓Checking a straight residential stair before cutting stringers
✓Comparing ideal and custom tread depths
✓Seeing how a hang or flush top attachment changes the layout
