Here is a few variations of compost densities. Weight is per cu yd. Source my County Agent ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ It varies greatly due to the materials that made up the compost and the moisture content of the compost. The range can be: Leaves Loose and Dry 300 Leaves Compacted and Moist 500 Grass Clippings Loose 400 Grass Clippings Compacted 800 Cattle Manure 1450 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Byron