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🪜 Stair Calculator

Calculate stair dimensions including number of steps, run, and stringer length.

How to Calculate Stair Dimensions

Divide the total rise (floor-to-floor height in inches) by your desired riser height (typically 7-8 inches) to get the number of steps. The total run equals the number of treads times the tread depth (usually 10-11 inches). Building codes typically require risers between 7 and 7.75 inches.

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