How much cement sand etc do i need(oh and im in a hurry)

[mpg]

hiya guys need to order my stuff before 5 (yes i know)


i`m doing a concrete floor in my kitchen 8ft x 7ft x5inch deep

how much do i need

used one of those online calculators 1:2:4 mix

218kgs cement
408kg sharp sand
816kgs gravel
120litres water

does that sound right

cheers guys

 

[mpg]

ok after checking on several site and then asking the bloke a jewsons looks like its about right however i have ordered a tom bag of ballast and 10 bags of cement

so my question is how do i mix the ballast with the cement to still get a 1:2:3 mix

cheers
matt

 

[marshman]

you don't the sand is all ready mixed with the stone
1:2:3 mix = 5:1 1:2:4 mix = 6:1

 

[mpg]

cheers marshman

for some reason i just couldnt get my head round that