Proper stair design is crucial for safety and comfort. The calculator uses standard building guidelines to determine optimal stair dimensions based on your available space.

Key Terms

• Rise: The vertical height of each step (typically 4"-7.75").
• Run: The horizontal depth of each step (typically 10" minimum).
• Total Rise: The total vertical height from floor to floor.
• Total Run: The total horizontal length the stairs will span.
• Stringer: The structural support that carries the treads and risers.

Building Codes

Most building codes require:

• Maximum riser height: 7.75 inches
• Minimum tread depth: 10 inches
• Consistent dimensions throughout the stairs (variation under 3/8")

Note: This calculator provides guidance only. Always consult local building codes and professional advice before construction.