Free Online U-Shaped Double Turn Staircase Calculator

A double-turn U-shaped staircase features two independent 90-degree turns with a middle flight between them. Unlike the standard U-shape (single 180° turn), this configuration offers greater flexibility in layout and can adapt to complex floor plans.

Each turn can be independently configured as either winder steps or a landing platform. This means you can have winders on the first turn and a landing on the second, or any other combination that suits your space.

The middle flight between the two turns adds additional steps, which can be advantageous when you need to cover a greater floor-to-floor height or when the stairwell has specific dimensional constraints.

This staircase type is particularly common in multi-story residential buildings and commercial spaces where the stairwell needs to fit within a specific footprint while accommodating higher floor-to-floor distances.

Our calculator lets you independently configure both turns, set the number of steps in each section, and visualize the complete staircase in 3D. All dimensions are calculated automatically based on your inputs.