Because I can't do it in imperial/standard...and the materials are not sold in metric...
I need to pave part of my drive, a roughly 12x24 feet patch.
I want to have pavers on a gravel base.
I am thinking 4 inches will work fine, the ground is packed like concrete...the vehicle would not be on top as a general rule, but hey, never discount a lazy husband right!
My round about calculation (turning feet into inches, then centimeters, then meters, the squaring and such)
left me an approximate needed volume of gravel of 2.6 cubic meters, roughly 3 cubic yards.
We bought huge rip rap for a creek bank project and if I remember right each trailer load was between 9 and 11 tons. Bought us between 9 and 11 really big rocks. But on the good side, you're only paying fractions of a penny per pound!
Our excavator operator said that money in the bank (creek bank, it was a very bad pun) is well worth it.
It's amazing to think that the semi trailers you see going down the road routinely haul up to 25 tons of aggregate in them, the volume vs. weight is really deceiving. Six tons of sand or fine aggregate like you'd put under pavers would just about fill one of the very small dump trucks, the kind that are like a decent-sized pickup truck with a little dump bed in the back. For some odd reason our company won't find me a material calculator that puts it into cubic feet or yards; I suppose because we price by the ton.