Precision calculations for stair rise, run, angle, stringer length, and more
The stair calculator calculates stair rise and run, stair angle, stringer length, step height, tread depth, and the number of steps required for a given run of stairs. For convenience and flexibility, this stair stringer calculator comes in two forms: automatic and manual.
Use the Automatic Calculator if the only crucial factor in your stair design is the Total Rise [A]. Using a few (modifiable) default settings, the automatic calculator will compute all of the other factors, including the Total Run [G].
Use the Manual Calculator if you know the Total Rise [A] and Total Run [G], and just need to determine the Number of Steps and Risers that will be required for your stairs.