How many 4x9 inch pavers are needed to cover 500 sq foot patio?

Area of each paver = 4"x9" = (1/3)'x(3/4)' = 1/4 sq ft.

Number of pavers required = Total Area/Area of Each Paver

= 500/ (1/4) = 2000 pavers.

In real life, though, the number of pavers will depend on the shape and exact dimensions of the area, how many pavers you need to cut or trim, what the wastage is.