Calculate stair dimensions including rise, run, angle, and stringer length for any staircase.
| Dimension | Value | Code Limit | Pass? |
|---|---|---|---|
| Rise per Step | 7.71 in | 4" min – 7¾" max (IRC) | ✓ |
| Tread Depth | 10.00 in | 10" min (IRC) | ✓ |
| Angle | 39.72° | 30°–50° recommended | ✓ |
| Dimension | IRC Residential | OSHA Commercial |
|---|---|---|
| Max Rise | 7¾" | 9½" |
| Min Rise | 4" | 6" |
| Min Tread | 10" | 9½" |
| Min Width | 36" | 44" |
| Headroom | 6'8" | 7'0" |
| Handrail height | 34"–38" | 30"–38" |