In this video

Begin by accurately measuring the total vertical rise that the staircase needs to cover. This measurement should be taken from the top of the finished lower floor to the top of the finished upper floor. If the finished flooring on the upper level is not yet installed, measure to the top of the subfloor and add the anticipated thickness of the finished flooring (e.g., 2 inches as mentioned in the video for future boards). This overall height is crucial for calculating consistent step dimensions.