Assuming that the size refers to 24 INCHES by 24 INCHES, each paver will cover
2 ft * 2 ft = 4 sq ft
So, to cover 120 sq ft will require 120/4 = 30 pavers.
This also assumes that the shape that is to be covered is "well behaved" and that all offcuts can be used. In that respect, it is a mathematical answer. For real life, depending on your skill level go for 5-10% more pavers.
Tiles that are two feet on a side cover 4 square feet. 378 of them cover 1512 square feet.
144.63 pavers
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.
Tiles that are two feet on a side cover 4 square feet. 378 of them cover 1512 square feet.
144.63 pavers
24x24 inches is two feet by two feet. 2x2 is four square feet.
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.
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).
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
30x20=600
157 18 by 18 tiles are needed to cover 352 square feet.
you would need 10 pavers to cover this area if the pavers are 1x1 ..most pavers are not this large they are usually 2x4. I would recommend buying a couple of extra pavers so that you can have cuts instead of all the pavers being the same size.