Question: what is the standard width of a step?
Answer: The width of one stair, after all, will need to be consistent with the rest of the stairs. The stair's width usually varies depending on the type of building the staircase is in, but for a normal residence, the standard tends to be 3 feet, 6 inches (106.7 cm). The minimum, in most places, is 2 feet 8 inches (81.3 cm).