144.63 pavers
Any reason why it shouldn't be 220, apart from the shape of the area?
4.5 pavers will cover 1 sq foot. So 4.5 x 360 =1620 pavers
If each paver is 6 x 3 then it has an area of 18 square feet. You will need exactly 25 of these to cover an area of 450 square feet.
1 square foot = 144 square inches100 square feet = 14,400 square inches8-in x 4-in = 32 square inches14,400/32 = 450 pavers
You would need 320 pavers to cover 160 square feet with 6x9 pavers, assuming each paver covers 0.5 square feet.
A 12x12 inch paver is one square foot. So you would need 240 square feet.
144.63 pavers
Any reason why it shouldn't be 220, apart from the shape of the area?
4.5 pavers will cover 1 sq foot. So 4.5 x 360 =1620 pavers
22.5
324
You would need approximately 104 pavers to cover 250 square feet with 16 x 16 pavers, assuming no cuts or wastage. This calculation accounts for the fact that each paver covers 1.78 square feet (16 x 16 = 256 square inches, which is equivalent to 1.78 square feet).
If each paver is 6 x 3 then it has an area of 18 square feet. You will need exactly 25 of these to cover an area of 450 square feet.
It will take four pavers to cover one square foot. You will need 720 pavers.
1 square foot = 144 square inches100 square feet = 14,400 square inches8-in x 4-in = 32 square inches14,400/32 = 450 pavers
In theory the answer is 240 tiles but this assumes that the area is "well behaved" and, if not, that you are prepared to use all the offcuts to fill bits in mosaic-style. A shape which in 17 inches wide, for example, will require a lot more pavers.