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  • pre-mix concrete bag

    How much surface 4" thick will a 60# bag of pre-mix concrete cover?

  • #2
    Re: pre-mix concrete bag

    According to Reade, portland cement weighs 94 pounds/cubic foot

    60 pounds / 94 pounds/cubic foot = 0.6383 cubic foot

    Now we have the volume and the thickness, so we can calculate the area. First have to convert 4 inches to feet.

    0.6383 cubic foot / (4 inches / 12) foot = 1.9149 square feet

    It will cover about 2 square feet that is 4 inches thick. Assuming a density of 94 pounds/cubic foot

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    • #3
      Re: pre-mix concrete bag

      Originally posted by harley dahnke
      How much surface 4" thick will a 60# bag of pre-mix concrete cover?
      I have an area 5'x4' 4' thick how many bags of concrete 40 lb do I need.

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      • #4
        Re: pre-mix concrete bag

        Try this calculator here:
        http://www.decks.com/calculators/concrete.aspx

        Though it only lists how many 60 pound or 80 pound bags you need. But you can take the 80 pound bag number and divide by 2.

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        • #5
          Re: pre-mix concrete bag

          I believe they are talking about "bags" of pre mixed conrete which come in 60 # bags as opposed to "sacks" of portand cement which weigh more.

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          • #6
            Re: pre-mix concrete bag

            Originally posted by harley dahnke
            How much surface 4" thick will a 60# bag of pre-mix concrete cover?
            The Instructions on the pre mix concrete bags say a #60lb bag will do 1 square foot, 4"thick.

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            • #7
              Re: pre-mix concrete bag

              The information was great thanks

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              • #8
                Re: pre-mix concrete bag

                How much surface 4" thick will a 80# bag of pre-mix concrete cover?

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                • #9
                  Re: pre-mix concrete bag

                  Originally posted by harley dahnke
                  How much surface 4" thick will a 60# bag of pre-mix concrete cover?
                  how many bags will be need to complete a 20' X 3'6"x4"

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                  • #10
                    Re: pre-mix concrete bag

                    how many bags of 80# ready mix I need for a 9'x9'x2"thick area?

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                    • #11
                      Re: pre-mix concrete bag

                      Look up a few posts to the calculator link. Just use the Square Footing to calculate whether it's 6"x12"x4" or 30'x20'x4". Although as you get into the really big areas your error will increase, because the amount of water you use in your mix will likely vary from what they used to get their data.

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                      • #12
                        Re: pre-mix concrete bag

                        how many bags of 60# or 80# do i need for an area of 13'x9'. 4" thick?

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                        • #13
                          Re: pre-mix concrete bag

                          Originally posted by Unregistered
                          how many bags of 60# or 80# do i need for an area of 13'x9'. 4" thick?
                          4" = 1/3 ft, so you need 39 ft³
                          An 80 lb bag yields 0.6 ft³, so 65 bags.

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                          • #14
                            Re: pre-mix concrete bag

                            how many bags of 60# ready mix concrete would i be needing if i want 5'x5' area that is 2" thick? I'm new to this, and have read a quick guide on what portland concrete is on a concrete guide, but I still do not know much about the quantities I should be using. thanks!

                            ____________________________________

                            larry

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                            • #15
                              Re: pre-mix concrete bag

                              Originally posted by Ready Mix
                              how many bags of 60# ready mix concrete would i be needing if i want 5'x5' area that is 2" thick? I'm new to this, and have read a quick guide on what portland concrete is on a concrete guide, but I still do not know much about the quantities I should be using. thanks!

                              ____________________________________

                              larry
                              2" = 2/12 ft
                              5' x5' x (2/12) ft x 1 bag/0.6 ft³ = 6.94 bags (use 7)
                              assuming 80 lb bag yields 0.6 ft³

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