Stair Calculator
Calculate staircase dimensions with building code compliance and visual diagrams
Calculation Mode
Choose your calculation method
Stair Dimensions
Enter measurements in centimeters
Vertical height from floor to floor
Horizontal depth of each step (min 22cm recommended)
Minimum vertical clearance (200cm recommended)
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Building Code Guidelines
Riser Height: 15-20 cm (6-8 inches) for residential stairs
Tread Depth: Minimum 22 cm (9 inches), 25-28 cm ideal
Stair Angle: 30-40° for comfortable stairs
Blondel's Formula: 2R + T should be 60-65 cm for comfort
Headroom: Minimum 200 cm (80 inches) clearance
Note: Always check local building codes. These are general guidelines.