SPC Stair Box & Set Calculator

Measure tread width, depth and riser height on site. Box quantities are based on the number of treads and risers required.

1180 mm

TREAD / TOP VIEW11 mm thick

300 mm

RISER / FRONT VIEW5 mm thick

200 mm

Diagrams explain the dimensions. Verify the nosing and finishing details against the product drawing and site measurements.

BOX AND SET CALCULATOR

Number of treads + risers

— boxes

Cutting allowance, spare pieces, landings, winding steps and finishing details are excluded. Confirm the final quantity against project measurements.