How many cubic yards do you need to fill your concrete forms? The answer may be found using a nomograph. The nomograph is a chart with which provides a means of calculation based on the width, height, and depth of the concrete slabe in question. In learning to use this short cut it would be well to determine mathematically the number of cubic yards you need and then check the result on the nomograph. Such comparison will reveal just how far you will want to depend upon the nomograph for accuracy. For smaller jobs especially, the nomograph should be very practical.