Calculator · Geometry & layout
Stair Stringer Calculator
The free Stair Stringer Calculator answers one question: Riser height, tread count and stringer length. Enter your numbers in inches or millimeters and the result updates instantly in your browser, with no sign-up and no app to install. Use it on your phone at the bench, then copy or print the result for your cut list.
Building codes in the US typically allow risers up to 7¾″ and treads of at least 10″.
Stair Stringer
- Number of risers
- 14
- Riser height
- 7 23/32″
- Number of treads
- 13
- Total run
- 10.83 ft
- Stringer length
- 14.08 ft
- Stair angle
- 37.6°
Pro tools · unlock
Which other geometry & layout calculators help with this project?
- Roof Pitch & Angle Calculator — Pitch, angle and slope from rise and run.
- Rafter Length Calculator — Rafter length for a shed or gable roof.
- Crown Molding Angle Calculator — Miter and bevel for cutting crown flat.
- Arc Radius Calculator — Radius from the chord width and arc height.
What you'll need for this project
Tools
Screws & hardware
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Build it · Intermediate · 1 day
Download the complete plan with cut list and materials list (PDF)
Shed & Garden Steps — 3-step stair with cut stringers for a shed, deck or garden slope. Drawings, cut list with board-foot totals, hardware list and step-by-step instructions.