This calculator will enable you to calculate the square footage of the area you are planning to turf, the amount of topsoil needed in cubic yards and cubic meters, and the number of rolls of turf you need.
Most of the common shapes are included and you can select these as required. It will return values for each of your selections and a total for the combined selections.
If you have an odd shape lawn split it up in sections to match available options as close as possible for the best results.