Three code checks most projects need first
A full IRC audit, ADA compliance, and egress width cover the majority of pass/fail questions — start here if you're not sure which of the eight codes applies to your build.
IRC Stair Code Checker
Audits width, headroom, handrail, guard and landing against IRC in one pass.
ADA Stair Compliance Calculator
Checks tread, riser, and handrail dimensions against ADA 505.
Egress Stair Width Calculator
Minimum egress width scaled to building occupant load, residential and commercial.
Browse by code
Grouped into two practical sets — the US residential and commercial codes, and accessibility plus the UK equivalent.
US Residential & Commercial 5
IRC Stair Code Checker
Audits width, headroom, handrail, guard and landing against IRC in one pass.
IBC Commercial Stair Code Calculator
Commercial stair limits under the International Building Code.
Landing Size Calculator
Minimum code landing depth and width — dimension check only, not framing.
Egress Stair Width Calculator
Minimum egress width scaled to building occupant load, residential and commercial.
Fire Escape Stair Calculator
Rise, run, and width limits for exterior fire escape stairs.
Accessibility & International 3
ADA Stair Compliance Calculator
Checks tread, riser, and handrail dimensions against ADA 505.
ADA Ramp Slope Calculator
Maximum ramp run and landing spacing for a given rise.
UK Building Regs Part K Stair Calculator
Rise, going, and pitch limits under UK Approved Document K.
Common questions about stair code compliance
What's the difference between the IRC Stair Code Checker and Rise & Run's warnings?
Is Egress Stair Width the same as a commercial occupancy calculator?
What's the difference between Landing Size and Landing Framing?
Does the site cover codes outside the US?
Browse the other 9 categories
Once your design passes code, these are the natural next stops — stair configuration, structural sizing, material take-offs, railing and cost.