Enter your staircase's Total Rise, Total Run, Number of Steps, Baluster Width, and Max Gap Between Balusters into the Stair Railing Calculator to find your Total Railing Length, Total Balusters Needed, Actual Spacing, Handrail Linear Feet, and Stair Angle.
Total Railing Length
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Total Balusters Needed
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Actual Baluster Spacing
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Handrail Linear Feet
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Stair Angle
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Spindles (balusters) should be spaced no more than 4 inches apart for safety, as required by most building codes. This prevents small children from getting their heads stuck between balusters.
Standard stair railing height is typically 34-38 inches measured from the stair nosing. Most codes require a minimum of 34 inches and maximum of 38 inches for residential stairs.
The stair angle is calculated using the arctangent of the rise over run ratio. Typical stair angles range from 30-40 degrees, with 35-37 degrees being most comfortable for daily use.
Building codes typically require handrails on at least one side for stairs with 4 or more risers. Stairs wider than 44 inches usually require railings on both sides.
Common baluster materials include wood, metal (iron, aluminum, steel), glass panels, and cable systems. The choice depends on your design preference, budget, and local building codes.
Measure the total rise (vertical height), total run (horizontal length), count the number of steps, and measure individual tread depth and riser height. Also measure any landings that need railings.
Open stringers expose the ends of the treads, while closed stringers have solid sides that hide the tread ends. This affects how the railing attaches and the overall appearance.