Deck Stair Calculator
Calculates rise, run, stringer length, number of treads, and code compliance for deck stairs
Height from the ground to the deck surface
Ideal riser height, typically between 6 and 8 inches
Width of the staircase, minimum 36 inches for most codes
Enter total rise and desired riser height to calculate
Adjusted riser height for even step spacing
Horizontal distance using a 10-inch tread depth
Length of each stringer board needed
4 stringers
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