Solve risers and treads from a floor-to-floor height, check the 2R+G comfort rule and code limits, and see the stair drawn to scale in section. Free, instant, in your browser.
Stair setup
Code limits (editable)
Rule of thumb: risers 150–190 mm, goings 250–300 mm, and 2R+G between 600–650 mm feel comfortable. Typical limits shown — always verify your local code.