Stair Calculator: Code Check

A stair calculator built for both residential and commercial projects — with IRC, IBC, ADA, and OSHA compliance built in. Enter your project specs and get every measurement you need to build right and pass inspection, the first time. What you input Total Rise Target Step Height Tread Thickness & Tread Depth Stringer mount type — Standard or Flush What you get Number of Steps & Steps on Stringer Height of First Step & Typical Step Height Total Run & Stringer Length Stringer Placement Stair/Rail Angle Compliance for every project type Most stair apps do the math and leave you to figure out the code. This one checks your design against the standards that apply to your project: → IRC — residential construction → IBC — commercial buildings → ADA — accessibility requirements → OSHA — workplace and industrial stairs Each code set has different requirements for riser height, tread depth, and stringer geometry. Know exactly which rules apply and whether your design passes — before you cut a single board. Customize for your jurisdiction Local amendments override the defaults everywhere. Enter your city or county modifications so compliance checks reflect the rules that actually govern your project — not just the national standard. For pros and DIYers alike Contractors & builders: catch violations before the inspector does Architects & designers: validate specs during design, not after Safety officers: verify OSHA compliance on industrial stair layouts Homeowners: build deck stairs confidently without guessing the code