The standard brick size is a 4 x 8 paving brick. We call this a True paver because the actual dimension is 4in.x 8in. It takes 4.5 brick to cover one square foot of area. Take the total area of desired patio space and multiply it by 4.5 to get the total number of brick needed. Most installers assume that an additional 5% should be added to cover waste. The web calculator will provide this information. The calculator can break up the paving area into rectangular sections. A maximum of 8 sections are allowed. If you have more sections that 8, try running the calculator multiple times as required and add the quantities by hand.Refer to patio calculator on the web.