Stair Calculator

Our stair calculator helps you determine the number of steps, rise per step, and total run for building stairs. Whether you're building deck stairs, basement stairs, or interior staircases, this tool calculates dimensions that meet building code requirements for safe, comfortable stairs.

Building code-compliant stairs require consistent rise and run dimensions. The calculator divides your total height by your preferred step height to determine the number of steps, then calculates the actual rise per step to ensure uniform spacing. Inconsistent steps are a tripping hazard.

This tool is perfect for DIY builders constructing deck or porch stairs, contractors planning staircase installations, and anyone asking "how many steps do I need for 8 feet?" Remember to check local building codes as requirements vary by jurisdiction.