1.Straight Stairs: calculate step rising, stepgoing, stairs angle, stairs rising and going.
2.Draw Stairs on Table: enter step rising and going, step quantityand you'll get data for draw 2 parallel stringers on table.
3.Balustrade: calculate gap between balusters.
4.Spiral or Helical Stairs: calculate handrail length, step rising,angle for baluster, circumference and curvature. When you havecircumference you can calculate gap between balusters and quantity.Curvature is bending radius for handrail.
5.Perfect Panel Length: calculate panel length.
6.Section (Panels Same Length): calculate number of panels for onesection and gap between balusters.
7.Section (Panels Different Length): panels are different lengthand gap between bars vary from panel to panel.
8.Calculate Radius: you'll get radius, arc length and panel length.

Drawings dimensions and data in input fields are the same.Calculations fires on key-up key.

I am 3d designer for Architectural Metalwork. I have morecalculations and will publish more in future. using my calculationswill save you time in production.