If it's a simple rectangular or square area that you wish to cover, then you simply multiply the width of the area by the length (use whole numbers for the measurement rounding up to the next whole number of feet where necessary) . Alternatively you may like to use our deck design tool, which allows you to place the tiles in a predefined grid and calculates automatically how many tiles of each type you will need.

If it's a more complicated shape, then the best idea is to draw the area on a piece of graph paper and count the squares.