For 644 square, a square is 100 square feet. 3 bundles to a square so 3x644=1,932 bundles. I imagine your question is how many bundles for 644 square feet. That's 20 bundles plus 2 for the starter course and the cap so 22 total.
The average bundle of shingles covers approx. 33 square feet so that puts you right around 14 bundles but it does depend on the shingles as coverage varies.
2175 two thousand one hunder and seventh five
There are 3 bundles of shingles in every square. A square is 100 square feet. In 23 bundles, you would have 766 square feet approximately
A bundle of Shingles will cover roughly 33 square feet. A square of Shingles (3 Bundles) will cover 100 square feet.
If your shingles say they cover 3 bundles to a square ( 10'x10' or 100 sq. ft) then one and a half. Some thicker, heavier shingles are 4 bundles to a square so you'd need 2.
3 bundles of shingles = 100 square feet 1 bundle of shingles = 33 1/3 square feet
How many bundles of 3-Tab Shingles are needed to cover 80 square feet?
54
9 bundles assuming std. 3 bundle/sq. shingles
8 bundles
How much area would 15 bundles of shingles cover. Standard duty shingles use 3 bundles for every 100 square feet so 15 bundles would cover 500 square feet.
Not sure, but one bundle covers 33.33 square feet. 3 bundles to a square.
73 bundles
If I recall from my roofing days, a square is 3 bundles of shingles. Those 3 bundles cover 100 of square feet.