Stair Calculator
Calculate stair rise, run, number of steps, and angle.
Number of Steps15
Actual Riser7.20"
Tread Depth10.6"
Total Run148.4"
Stair Angle34.2°
IRC residential code: risers 4–7.75", treads ≥10". Rule of thumb: 2R + T = 25"
Calculate stair rise, run, number of steps, and angle.
IRC residential code: risers 4–7.75", treads ≥10". Rule of thumb: 2R + T = 25"