Shingles for a 3,800 sq ft roof

126 bundles of shingles

for 3,800 sq ft of roof (38 squares) with 10% waste, at 3 bundles per square.

Materials for a 3,800 sq ft roof

Squares38
Bundles, gable roof (10% waste)126
Bundles, hip roof or valleys (15% waste)132
Synthetic underlayment (1,000 sq ft rolls)4
#15 felt (400 sq ft rolls)10
Roofing nailsabout 96 lb

If 3,800 sq ft is the footprint, not the roof

Measured flat from above, a footprint of 3,800 sq ft makes a bigger roof once you account for the slope:

PitchRoof areaSquaresBundles
4/124,006 sq ft40.1133
6/124,249 sq ft42.5141
8/124,567 sq ft45.7151
10/124,946 sq ft49.5164
12/125,374 sq ft53.7178

Start from your house footprint instead

Shingles needed

126 bundles

3,800 sq ft of roof (38 squares) at 6/12, plus 10% waste.

Roof area3,800 sq ft
Squares38 (order 41.8)
Bundles (3 per square)126 (about $5,040)
Synthetic underlayment4 rolls of 1,000 sq ft
#15 felt10 rolls of 400 sq ft
Roofing nailsabout 96 lb

Other roof sizes

Questions

How many bundles of shingles for a 3,800 sq ft roof?
126 bundles: 38 squares plus 10% waste, at 3 bundles per square. Allow 132 for a hip roof or one with valleys.
How many squares is a 3,800 sq ft roof?
38 squares (a square is 100 sq ft of roof).
How much does it cost to shingle a 3,800 sq ft roof?
Shingles alone run about $5,040 at $40 a bundle. A full asphalt shingle replacement typically costs $4 to $8 per sq ft installed: $15,200 to $30,400.
My house is 3,800 sq ft. How big is the roof?
Bigger than the house. For a one-story 3,800 sq ft house with a 6/12 roof and 1 ft overhangs, the roof is roughly 4,760 sq ft. Two-story homes have about half the roof area for the same floor space.

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