Stair Calculator

Quick estimator for straight stairs using open stringers.

Stair Inputs

Enter your total height and preferred tread / rise values.

Total Height (inches) From finished floor below to finished floor above.

Target Rise per Step (inches)

Tread Depth / Run (inches)

Tread Overhang / Nosing (inches)

Stair Width (inches)

Stringer Lumber

Include Treads?

Tread Board Material

Tread Thickness (inches)

Closed Risers?

Riser Material

Waste %

Optional — only used for rough estimate totals.

Edit Material Prices Click here to adjust local lumber and sheet prices

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Enter your stair information and tap Calculate Estimate.