Free Online Stair Calculators

Design your perfect staircase with our interactive 3D calculators. Get accurate dimensions, visualize in real-time, and export professional drawings.

Choose Your Stair Type

Select a calculator to start designing your staircase

Calculate and visualize a straight staircase in 3D. Get step dimensions, rise/run ratios, and export professional drawings. Free online tool.

Design an L-shaped staircase with 90° turn. Choose between winder steps or landing platform. Free 3D calculator with real-time visualization.

Calculate a U-shaped staircase with 180° turn. Configure winder steps or landing platform. Free 3D visualization tool.

Design a U-shaped staircase with two independent 90° turns. Configure each turn separately. Free 3D calculator with professional drawings.

Export CNC-ready DXF drawings for precision manufacturing. Compatible with all major CAD software.

Generate complete staircase blueprints with dimensions, materials list, and assembly instructions.