How many 25kg bags to a cubic metre?

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Im sure some of you clever guys know this answer.....
Ive had ranges from 44 to 60 per m3. Any clarification welcome.....
 
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A cube of cured concrete is about 2400kgs. Less water at about 155kg is 2245kgs. That's about 90 bags of dry aggregate and cement..
 
Who was your maths teacher John ;)
A 1:6 mix is 2400/7 is 342 kg of cement so 14 bags.
Ah you've edited since I posted. :)
 
We usually reckon on two tonnes of ballast per cube.

This equates to about 80 bags at 25kg's
 
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I would have said about 80 but this is 40N concrete and will have lower than usual water content. So I'm sticking with closer to 90.
 

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