Calculator - Measuring Guide.
Measuring the area you want can be quite daunting, we have added some information here that may help you. It is very important that you order approximately 5% - 10% extra filling odd spaces and to cover the inaccuracy of measurements. To measure the area, its a good idea to make a sketch to assist you with your calculations, multiply the average length by the average width and depth to determine the amount you will need.
Below we have split it into the relevant sections. The reason that they differ is due to the calculations using different densities.
