**Measure the stairway’s total rise and divide by the estimated riser height (around 7 inches) for the number of steps. Divide the total rise by the steps for the exact riser height. Use a framing square and pencil to mark all steps on a 2- x 12-inch board.**

## How to Calculate Stair Stringers?

Calculating stair stringers correctly is a crucial part of building a safe and sturdy staircase. Stair stringers are the structural members that support the treads and risers of a staircase. To ensure that your stringers are properly sized and positioned, you must calculate them using certain measurements and formulas. The following steps will guide you through the process of calculating your stair stringers.

Before you start calculating, you need to decide on a few key components of your staircase. First, decide on the rise of the stairs, which is the vertical distance between the upper and lower floors. You will also need to decide on the run of the stairs, which is the horizontal distance between the upper and lower floors. Additionally, decide on the number of steps you will have in your staircase.

Now that you have your measurements, you can begin calculating your stair stringers. First, you need to calculate the width of the stringer. To do this, divide the total run of the staircase by the number of steps, plus one. This will give you the width of the stringer for each step.

Next, determine the length of the stringer. To do this, you must use the Pythagorean theorem, which states that the square

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