If the roof is 288 sq. ft. Then it will take 3 square of shingles, as each square covers 100 square feet. You will need the extra for waste. Usually a square of shingles is three bundles. However, that may vary by manufacturer.
Standard fiberglass shingles come 3 bundles to the square.
8 bundles
73 bundles
There are 3 bundles in a square if you are using 3 tab. 4 bundles if you are using Architectural.
100 sq ft = 1 square.
4
standard shingles 11 bundles heavy wt 15 bundles
4 bundles for 15 year. 3 bundles for 25 year.
One bundle of shingle covers about 33 square feet of roof hence around 850 bundles of shingles will be needed for 28000 square feet roof!
Some asphalt shingles come 3 bundles to a square, and some come 4 bundles to a square. Make sure you know before purchasing.
A 30x50 roof has 1,500 square feet which is 15 squares. 3 bundles of shingles equals 1 square so you will need about 45 bundles.
3 bundles to a square and 100 sq. ft. in a square, so 3 times 16 equals 48. Depending on how much roof edge and peak add a couple bundles for starter strip and the cap.