Stair Calculator
Calculate stair dimensions with IRC code compliance checks. Get material estimates for stringers and treads.
Floor-to-floor height · 108" = 9' floor
Stair Layout
14 risers × 13 treads
Step Dimensions
| Actual Rise per Step | 7.71" |
| Actual Run per Step | 10.00" |
| Total Run | 130.0" (10.8 ft) |
| Stringer Length | 169.0" (14.1 ft) |
IRC R311.7 Code Compliance
✓Rise: 7.71" (4"–7.75")
✓Run: 10.00" (10" min)
✓Comfort: 17.71" (17"–18")
iHeadroom: verify 6'8" minimum clearance on site
Materials
| Stringers (cut) | 4 × 16' 2×12 |
| Tread Material | 39.0 board feet |
| Riser Material | 31.5 board feet |