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Stairs for a 108-inch Rise

A 108" total rise works out to 14 steps at 7.71" each, 13 treads, and 3 stringers about 14.5 ft long. Adjust tread depth and width below.

01 / YOUR MEASUREMENTSUpdate any value
Steps
14 steps
Steps (risers)
147.71" each — max 7¾"
Treads
1310.5" run each
Total run
11.4 ft137" horizontal
Stringers
32×12 × 16' — ~16" o.c.
Stringer length
14.5 ftmeasured along the slope
Material cost (est.)
$523lumber + fasteners

Planning estimate. Adjust allowances and sample prices for your supplier; tax, delivery, and labor are not included.

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Want the full guide — tools, step-by-step, common mistakes and FAQ? See the Stair Stringer Calculator.

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