1 Your measurements

Type feet and inches the way you'd write them, like 12' 6" or 30 3/8. Decimals work too.

ft
ft
/12
4/12 is low, 6/12 is common, 9/12 and over is steep. To convert a pitch to degrees, see the roof pitch calculator.
in
Most architectural shingles: 3. Some premium lines: 4–5.
$

2 What to buy

Shingle bundles
50
16.53 squares incl. 10% waste
Roof area
1,503 sq ft
pitch factor 1.118
Underlayment
2 rolls
synthetic, 10 squares each
Footprint incl. overhang1,344 sq ft
Sloped roof area1,503 sq ft
Squares (100 sq ft) with waste16.53
Ridge / hip length42 ft → 2 bundles of ridge cap
Eaves + rakes156 ft → 2 starter bundles, 16 × 10 ft drip edge
Roofing nails≈ 5,440 (≈1 × coil box of 7,200)

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