You are în need of about 1 cubic yard of sand pe 1000sqft to get about 1/2" coverage. Also prior to doing this you need to take the lawn/weeds/grass to scalping mode. Get it close as possible to the ground that way the sand will work easier I to the canopy of the grass crowns. It will be hard work and will have to do it over 2 season minimum. Sand Works better than compost since organic matter breaks down overtime. No nutrient added value from the sand but the purpose of this is to level the lawn. Good luck and there are plenty of YouTube vids on this also. Sent from my SM-N960U using Tapatalk