That would depend on the amount of square footage covered per bundle, a figure that can vary. Tell the supplier that you need enough shingles to cover 168 square feet, or check the information on the back of the bundle which will describe the bundle's coverage.
3 bundles in a square 1 square is 100 square feet. 1406 square feet?? If so, that's 14 square. 3x14=42
Standard grade, 3 bundles to a square. 1 square is 100 sq. ft. 5 bundles for 140 sq. ft.
If you are using 3 tab it will be 39 bundles. If you are using Architectural you will need 52.
One square covers 100 square feet, with 3 bundles per square equals 51 bundles.
4 bundles
How many bundles of 3-Tab Shingles are needed to cover 80 square feet?
9 bundles assuming std. 3 bundle/sq. shingles
54
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.
73 bundles
A bundle of Shingles will cover roughly 33 square feet. A square of Shingles (3 Bundles) will cover 100 square feet.
3 bundles of shingles = 100 square feet 1 bundle of shingles = 33 1/3 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.
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.
4 bundles of shingles covers 100sq.ft. of course this is approx. shingles come in several sizes and then you must allow for waste cuts etc