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

Expand only if you want to adjust your local lumber and sheet prices.

Loading prices...

Enter your stair information and tap Calculate Estimate.