Rise and run
Stairs are measured in inches — floor to floor, straight across.
Floor surface to floor surface — the full vertical climb.
How much horizontal space the stair gets.
How wide is the stair?
Wide stairs need a middle stringer so treads don't bounce.
Your stair layout
Cut this many risers
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💡 Pro field tips
🧰 Tools you'll need
Tap to check off as you load up.
Est. project cost (optional)
File this estimate under a job name or PO to track what to order. Leave blank to file under "General".
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