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#practicalengineering This video shows you how to CALCULATE STAIR STEPS.......WITHOUT ERRORS!!! What is a riser? What is a tread? Is the number of risers equal to the number of steps? In this video I will show you how to CALCULATE CORRECTLY!!! Example of height: 3.05 meters. 3.05m/0.16m = 19.06 risers. (this calculation must be exact) Correct: 3.05/19 risers = 0.161m or 16.1cm 19 risers of 16.1cm 18 steps. In this case, I suggest you add LANDINGS to reduce this number of steps....(at least 1 landing in the middle.....)