How to calculate the number of bags of premix concrete
Please help! I am frustrated in not being able to calculate a simple task!:(
I am erecting a new deck and am using "High wind post anchors" (Pryda).
The 9 post holes are to be 300 round and 650 deep - simple enough. But for the life of me I cannot work out the number of bags of General Purpose concrete for the job. Bunnings sell 20kg bags (heavy enough for an old codger like me) and my head is spinning trying to calculate cubic meters and volumes and decimal points and pi and watching cricket etc. My school boy arithmatic keeps giving me different results!:eek:
Is there a good samaritan out there who can simplify things for me. One web site suggests 320 x 320 x 50 per bag but this only confuses me more.:confused:
Hopefully there is someone (or web site) who knows how many 20 kg bags per hole - or am I the only one who get confused?
Compliments of the season to you all:)
Aussieglen