Incredible 50 Lb Bag Of Sand Covers How Much Area Ideas. Web answer (1 of 5): It depends on how thick you want the sand to be after spreading.
If you spread it to 1 inch thick, it will cover. Web your area would be 5′ x 10′ = 50 sq. For example, if the sandbox has a radius of 4 feet, and you want the sand to be 1 foot deep, you will need a little more.
