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#1
12-23-2005, 07:29 AM
 harley dahnke Guest Posts: n/a
pre-mix concrete bag

How much surface 4" thick will a 60# bag of pre-mix concrete cover?
#2
12-23-2005, 04:34 PM
 Robert Fogt Administrator Join Date: Dec 2005 Location: Seattle, WA Posts: 3,449 Rep Power: 13
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
#3
10-13-2006, 07:46 PM
 Unregistered Guest Posts: n/a
Re: pre-mix concrete bag

Quote:
 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.
#4
10-13-2006, 11:50 PM
 Robert Fogt Administrator Join Date: Dec 2005 Location: Seattle, WA Posts: 3,449 Rep Power: 13
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.
#5
12-13-2006, 01:25 PM
 Unregistered Guest Posts: n/a
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.
#6
01-05-2007, 09:23 AM
 Unregistered Guest Posts: n/a
Re: pre-mix concrete bag

Quote:
 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.
#7
06-08-2007, 11:36 AM
 Unregistered Guest Posts: n/a
Re: pre-mix concrete bag

The information was great thanks
#8
06-24-2007, 08:28 AM
 Unregistered Guest Posts: n/a
Re: pre-mix concrete bag

How much surface 4" thick will a 80# bag of pre-mix concrete cover?
#9
07-13-2007, 06:59 AM
 Unregistered Guest Posts: n/a
Re: pre-mix concrete bag

Quote:
 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"
#10
08-05-2007, 02:27 PM
 Unregistered Guest Posts: n/a
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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