Brick, stone or concrete pavers provide an easy do-it-yourself approach to build a patio, terrace or course. Preparing the place is more challenging than laying the pavers. There are many shapes and sizes of pavers to choose from. You want to make sure to receive enough pavers, though, because in case you need to return and purchase more, they might not be in the exact same lot and might be slightly different colors.

Determine the surface area of your pavers. Multiply the length in inches by the width in inches and divide by 144. Irregularly shaped pavers are generally sold by their typical dimensions, which can be used. Check with the supplier to get the precalculated surface area if it’s accessible.

Calculate the area of the half circle. Gauge the horizontal side of this half circle. Divide this measurement by 2 to get the radius. Square the radius. (That is, multiply the radius by the radius.) Multiply this number by 3.14. Divide by 2.

Calculate the number of pavers required by splitting the area of the half circle by the surface area of the person paver. Add 10 percent to account for waste, splitting and cutting.