Stair Calculator
Calculate stair dimensions and check building code compliance
✓ Your Input
Select calculation type, enter your values, and click Calculate to see results and step-by-step solution.
Πλήρης Οδηγός χρήσης
What is a Stair Calculator?
A stair calculator helps design safe and code-compliant stairs by calculating riser height, tread depth, stringer length, and checking building code requirements.
Τρόπος Χρήσης
- Select calculation type
- Enter required measurements and options
- Click Calculate to see the result and step-by-step solution
- Use Reset to clear and hide results
- Review compliance status when shown
Stair Terminology
Riser: Vertical part of step
Tread: Horizontal part of step
Stringer: Supporting beam
Total Rise: Total vertical height
Total Run: Total horizontal distance
Building Code Standards
Riser Height: 4-7.75 inches
Tread Depth: 10-14 inches
Τύπος: 2R + T = 24-25 inches
Maximum Rise: 12 feet between landings
Φόρμουλες
Riser Height: Total Rise / Number of Risers
Tread Depth: 24.5 - 2R
Total Run: Tread Depth × (Risers - 1)
Stringer Length: √(Rise² + Run²)
Angle: arctan(Rise / Run)
Common Dimensions
Residential: 7" riser, 11" tread
Commercial: 6.5" riser, 12" tread
Steep: 7.5" riser, 10" tread
Gentle: 6" riser, 13" tread
Σημαντικές Σημειώσεις
- All risers must be uniform height
- All treads must be uniform depth
- Check local building codes
- Consider handrail requirements
- Account for headroom clearance
Κοινές Εφαρμογές
- Residential stair design
- Commercial building stairs
- Deck and patio stairs
- Basement stairs
- Building code compliance