Stair Stringer Calculator
Enter total rise, tread depth, and preferred riser height to estimate stair stringer dimensions.
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How stair stringers are calculated
Riser count is estimated by dividing total rise by the preferred riser height and rounding to the nearest whole number.
Total run is tread count multiplied by tread depth. Stringer length is calculated with the Pythagorean theorem.
Stair angle is calculated from the rise and run to help verify comfort and code compliance.