Stair Rise And Run

Calculate rise, run, angle, and stringer length for stairs based on height, run, tread, and headroom. Learn stair terminology, building codes, and fraction to decimal conversion. Use this tool to find the stair rise and run, stair angle, stringer length, step height, tread depth, and number of steps for a given run of stairs.

Choose between automatic and manual modes, and see the related building codes and diagrams. Learn how to measure and calculate stair rise and run, slope and angle, and tread depth and riser height for comfortable and safe stair design. See standard measurements, rules of thumb, and conversion formulas for different types of stairs, ramps, and ladders.

A Stair Rise and Run Calculator is an essential tool for builders, contractors, and DIY homeowners. It helps calculate the number of steps, riser height, total run, stair angle, and stringer length to ensure stairs are safe, comfortable, and code-compliant. Free professional stair calculator that computes rise, run, stair angle and ergonomics based on ISO standards.

Ideal for architects, builders and homeowners. Use our online stair calculator to work out stair parameters such as rise, run, angle and stringer length for your next home improvement project. Learn what rise and run mean for stairs, how to calculate them, and why getting these numbers right makes steps safer and more comfortable to use.

Free staircase rise and run calculator. Estimate riser height, tread depth, and total run fit for safer and more comfortable stair planning. From risers to nosing, get clear guidance on the standard stair rise and run to ensure your stairs are safe, functional and up to code.

What Is the Rise & Run Calculator? Find the optimal riser height and tread depth combination for any total rise using the industry-standard 2R+T comfort rule. This optimizer evaluates every valid step count within your specified range and ranks combinations by how closely they approach the ideal 2R+T = 25 inches.