Stringer Calculator
Calculate the length and angle of stair stringers based on total rise and run.
Published by:
isCalculator Editorial Team
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How to use this tool?
How to Use the Stringer Calculator
- Enter Total Rise (in inches): The vertical distance from the lower floor to the upper floor. Example:
105. - Enter Total Run (in inches): The horizontal distance the stairs cover. Example:
120. - Click "Calculate Stringer" to get results.
Results explained:
- Stringer Length – The diagonal length of the stringer (hypotenuse).
- Angle – The stair angle in degrees.
- Number of Steps – Estimated steps assuming a 7-inch rise per step.
All inputs must be positive numbers in inches. The calculator uses imperial units only.
Previous Results
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Frequently Asked Questions
A stringer is the structural support for stairs, typically a slanted board that supports the treads and risers.
Total rise is the vertical distance from the lower floor surface to the upper floor surface, including any finished flooring.
A typical step rise is about 7 inches, but local building codes may vary. Our calculator uses 7 inches for estimating number of steps.