Advanced Stair Calculator
Calculate stair dimensions with multiple unit support
Input Parameters
Calculation Results
Riser Height:
17.5 cm
Tread Depth:
21.88 cm
Stair Angle:
38.7°
Total Steps:
16
17.5 cm
17.5 cm
17.5 cm
17.5 cm
Stair Calculation Formulas
Riser Height Formula
R = H / N
Riser Height = Total Height / Number of Stairs
Tread Depth Formula
T = D / (N – 1)
Tread Depth = Total Depth / (Number of Stairs – 1)
Stair Angle Formula
θ = arctan(R / T)
Angle = arctan(Riser Height / Tread Depth)
Note: This calculator provides approximate values for stair dimensions. Always consult local building codes and regulations before construction.
Recommended values: Riser height 15-20 cm, Tread depth 25-30 cm