Stair Calculator | Accurate Rise, Run & Stringer Solver
Calculate staircase riser heights, tread counts, stair angles, and stringer lengths. Checks residential building codes (IRC) and Blondel
Inputs Configuration
Calculation Output Status
Successfully Solved
Solved
RISER COUNT13
TREAD COUNT12
ACTUAL RISER HEIGHT7.69
ACTUAL TREAD DEPTH10
TOTAL RUN120
STAIR ANGLE37.6
STRINGER LENGTH156.2
SUGGESTED LUMBER LENGTH16-foot 2x12 Board
BLONDEL INDEX25.38
COMFORT RATINGGOOD