Roof Pitch & Shingle Calculator

DETECTOR IDLE

Select a module in the rack to inspect that stage.

01Roof pitch

RISE — INCHES PER 12″ OF RUN

: 12 run

LENGTH

WIDTH

Plan area of the building at the wall line. The pitch multiplier below converts it to actual roof deck area.

ROOF SHAPE (SETS WASTE)

WASTE MARGIN

10%

BUNDLES PER SQUARE

UNDERLAYMENT

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— · — deck angle
f = √(rise² + 12²) ÷ 12 — multiplies plan area to true deck area.

Plan footprint—

× slope factor → deck area—

+ waste margin → order area—

Squares required—

Exact bundles—

BUNDLES TO BUY—

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ROLLS TO BUY—

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