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Stairs for a 42-inch Rise

A 42" total rise works out to 6 steps at 7.00" each, 5 treads, and 3 stringers about 5.6 ft long. Adjust tread depth and width below.

01 / YOUR MEASUREMENTSUpdate any value
Steps
6 steps
Steps (risers)
67.00" each — max 7¾"
Treads
510.5" run each
Total run
4.4 ft53" horizontal
Stringers
32×12 × 8' — ~16" o.c.
Stringer length
5.6 ftmeasured along the slope
Material cost (est.)
$236lumber + 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.

Other sizes

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