The Scotts Turf Builder Lawn Soil 1.5 cu. ft. bag weighs approximately 30 lb when dry and can weigh around 40 lb or more when damp, depending on moisture content. Lowe's +1 Since you're concerned about lifting it, I would plan for a bag weighing up to 40 lb rather than assume it will be 30 lb. If that is too heavy, look for a smaller 0.5 or 1 cu. ft. bag.