How do I calculate stairs?

Divide total rise by about 7 inches to get the number of risers, then the run is the number of treads times the tread depth (about 10.5 inches).

What is the ideal stair riser height?

Comfortable stairs use risers around 7 inches and treads around 10–11 inches. Codes set maximum riser and minimum tread limits.

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Steps, riser height, and run for a staircase.

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How do I calculate stairs?: Divide total rise by about 7 inches to get the number of risers, then the run is the number of treads times the tread depth (about 10.5 inches).
What is the ideal stair riser height?: Comfortable stairs use risers around 7 inches and treads around 10–11 inches. Codes set maximum riser and minimum tread limits.