Concrete Patio Hardcore Depth

Ziycon

I'm looking to concrete and area roughly 34m sq. out the back garden (odd shape not just a square) I'm not sure how deep it needs to be, most articles on-line are suggesting 4" thick!?

Trying to get an idea of how much cement, sand, aggregate, underlay I would need to work out a price to do it myself as I have access to a medium mixer (one of the orange ones you see on house work sites) or if I'm better off just preparing the ground myself and getting the cement ready mixed and wheel barrel it into the back garden.

This is my first time trying my hand at cement but I tend to be OK with DIY. Any suggestions/help greatly appreciated.

Edit: After a lot of Googling and reading articles, comments I'm looking at laying 2 inches of hardcore and 4 inches of cement, should this suffice as it's just an area for the dog to run around and have patio furniture for now.

650gs

If its only a dog run that will be fine, mixing yourself is hard but handy if you have a few mates to help ready mix is the way to go

One shot on kill

2 inchs wacked good and tight would be a bit on the light side but if the ground is good and hard it will be ok.