How Many Stairs Do I Need

Divide the rise by 6 or 7 inches (15 or 18 cm) to find the total number of stairs. For larger stairs, divide by 6 and for smaller stairs, divide by 7. The total you get is how many stairs your future staircase will have so you can plan accordingly.

How do you calculate number of stairs?

Divide the rise by 6 or 7 inches (15 or 18 cm) to find the total number of stairs. For larger stairs, divide by 6 and for smaller stairs, divide by 7. The total you get is how many stairs your future staircase will have so you can plan accordingly.

How many stairs do you need for a 8 foot ceiling?

An 8-foot ceiling will need 14 treads. Divide 96-inches (8-feet) by 7-inches to get 13.71 treads, and round up to 14. In this case, you would not round down as you would have one step that is too tall.