27 bags of 80 lb concrete mix you need 3.00 * 16.00 * 0.33 = 16.00 cubic feet of concrete an 80 lb bag of concrete mix is .6 cubic feet you need 16.00 / .6 = 26.67 -> 27 bags of 80 lb concrete mix
One 80lb bag = 0.6 cubic feet Forty-five 80lb bags = 1.0 cubic yard
10 bags of 80 lb concrete mix you need 6.00 * 6.00 * 0.17 = 6.00 cubic feet of concrete an 80 lb bag of concrete mix is .6 cubic feet you need 6.00 / .6 = 10.00 bags of 80 lb concrete mix
Yes you can.
The square foot coverage of each bag of QUIKRETE Concrete Mix depends on the thickness of the application. If you are using common 2x4" lumber for your forms, each 80-pound bag will fill an area of 2 square feet. For thicker applications, each bag will cover less square footage. For assistance with your calculations, you can visit our website at: https://www.quikrete.com/calculator/main.asp#concrete or we will be glad to assist either online via LiveChat at www.quikrete.com or toll free at 800-282-5828.
23 bags at 4" thick
The pallets QUIKRETE uses for Concrete Mix are not heat treated or chemically treated. They are stenciled with paint on the sides.
The hole diameter should be 3 times the post diameter, so for each 12” hole 2-1/2’ deep, you will need 1.68 cubic feet of concrete. Each 80-pound bag of QUIKRETE® Concrete Mix will yield approximately 0.6 cubic feet when mixed, so you will need 2-3/4 80-pound bags per hole, so 99 bags all together. Yields will vary with waste, uneven substrate, etc.
5 bags of 80 lb concrete mix a bag of 80 lb concrete mix is .6 cubic feet you need 2.94 / .6 = 4.9 -> 5 bags of 80 lb concrete mix
Can't answer the question without the thickness of of the pour need length width and height