Free Online L-Shaped Staircase Calculator
An L-shaped staircase features a 90-degree turn, making it one of the most popular choices for residential buildings. The turn can be achieved using either winder steps (typically 3 pie-shaped treads) or a square landing platform, each with distinct advantages.
Winder steps create a more compact staircase by maintaining continuous movement through the turn. This saves floor space but requires more precise manufacturing. A landing platform provides a resting point and is generally considered safer, especially for elderly residents or children.
The critical dimension for L-shaped stairs is the well opening — the rectangular hole in the upper floor through which the staircase passes. Proper headroom clearance (minimum 2000mm) must be maintained throughout the turn area.
Our calculator handles both turn configurations automatically. Simply select your preferred turn type, set the number of steps before the turn, and the calculator optimizes all remaining dimensions including the winder geometry or platform size.
Material choices significantly affect both the weight and cost of an L-shaped staircase. The turn area typically requires the most skilled craftsmanship, particularly for winder steps which need precise angular cuts.