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Step 2 · Determine the Number of Treads

Divide the total rise (measured in Step 1) by a desired riser height, usually between 7 and 7.5 inches. For example, if the total rise is 105 inches, dividing by 7 inches gives 15 treads. Round this number up or down to the nearest whole number that yields a practical riser height. The number of treads will be one less than the number of risers.

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Step 2 · Determine the Number of Treads

Divide the total rise (measured in Step 1) by a desired riser height, usually between 7 and 7.5 inches. For example, if the total rise is 105 inches, dividing by 7 inches gives 15 treads. Round this number up or down to the nearest whole number that yields a practical riser height. The number of treads will be one less than the number of risers.

Videos for this step

Calculate Number of Risers and TreadsCalculate Number of Risers and TreadsCalculate Risers, Treads, and Total Run

Tools and Materials

← Project

How to Measure and Plan Treads for a Split-Level Staircase

Step 2 of 8·1.3 hr left

Measure the Total Rise
10 minutes2 items
2
Determine the Number of Treads
5 minutes1 items
3
Calculate the Actual Riser Height
5 minutes1 items
4
Measure the Total Run
10 minutes1 items
5
Determine the Tread Depth
5 minutes1 items
6
Plan for Nosing and Overlap
5 minutes
7
Sketch the Staircase Layout
15 minutes3 items
8
Verify with Local Building Codes
30 minutes2 items
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