If you are talking about ready-mix (the kind you only add water to), a bag will cover 2 sq ft at 4" depth (1' x 2' x 4"). On a standard bag of concrete, you will find the cubic feet the bag will fill. One bag of mortar, if spread and applied evenly, can go upwards of 100 square feet a bag. Cubic Feet of Concrete in a 40lb bag. This is the bag’s “yield,” and this number will act as the proper coverage for your home project. The yield of most concrete mix is roughly 0.15 cubic feet for every 20 pounds of mix. Cubic Feet of Concrete in a 60lb bag. 1' x 4' x 1" thick. Sanded. One 50 lb. Assuming the mix ratio of the floor is 1:3:6 and the thickness of the floor is 150mm (1m by 1m by 0.15m). Your 1' x 1' x 6" example equals 1/2 cubic foot. ft. That's only approx 6 cubic ft. That would only cover an area 6' x 12' x 1" A 50 lb. RECOMMENDED SPACING . Cubic Yards of Concrete in a Circular Slab. If using the standard 1:2:3 proportion of cement to sand to gravel, each 94-pound bag of cement can be used for 6 cubic feet of concrete. A 4’ by 8’ pour at 4” thick will require 10-2/3 cubic feet of concrete… Some information are lacking in this question. 1. The coverage should be written somewhere on the front or back of the bag. (based on 50lbs bag) Mesh Mosaics: Mesh Mosaics: 3/16 inch V-Notch: 90 - 100 Sq Ft: 4 inch - 12 inch Tile ... 1/2 inch Square or V-Notch: 40 - 50 Sq Ft: Cement Board Installation : 1/4 inch Square: 75 - 85 Sq Ft . Answer: One 50# bag per 1' x 1' x 6" area. You omitted the thickness of the floor. The calculator will then tell you the number of bags you need based on the different size of bags we carry. ... How many 80lb bags of concrete needed for a slab. TILE SIZE. The guy could easy use 12 1/2 bags. Sq Ft COVERAGE (based on 25lb sanded) Ceramic Mosaic Thin-Set Mortar (cement) Calculated results will reflect how many bags are needed for Block and Brick. You didn't state the mix ratio of the concrete; 2. bag contains less than 1/2 a sq. Unit volume: 0.444 cubic yards (12 ft 3): Total volume: 0.444 cubic yards (12 ft 3): Concrete needed: 0.80 tons (1,596 lbs) Concrete needed (bags) 19.95 bags of 80 lbs each, or 26.59 bags of 60 lbs each, or 39.89 bags of 40 lbs each The amount of Portland cement necessary will depend on the mix design you use. Prorating this information, it would take 50/40 times 1 bag or 1.25 40# bags to do the same area 6" thick. Using 60# bags it would take 50/60 x 1 = 0.833 bags bag would cover an area approx. How many 80lb bags of concrete for so many cubic yards of concrete. Per Sakrete a 50# bag will contain 1/2 cubic foot of concrete. Cubic Feet of Concrete in a 80lb bag. Enter the number of bricks or blocks below to calculate how many bags of mortar will be needed, or how much materials will be needed to mix on-site. So, use 10 bags to help secure the backerboard down to the subfloor, with the screws. Enter the number of bricks (8" x 2" x 4") or blocks (8" x 8" x16") in the box below that you plan to use for your project.