Stair Calculator: Run & Rise

Design and calculate stairs with precision and ease. Stair design can be complex, with many variables to consider. This app simplifies the process by helping you visualize and calculate stair dimensions based on total rise and run. Explore multiple stair layout options, compare comfort scores, and instantly see how dimensions, slope, and geometry change with detailed diagrams. Features: • Stair angle calculator • Stair geometry & slope calculator • Riser height calculator • Stair design tool with visual diagrams • Comfort scoring and stair recommendations • Multiple tread and riser layout options • Material and rough framing estimates • Save projects for later • PDF, blueprint, and printable exports • Length unit converter Share your results via email, SMS, or messaging apps.