I sell some firewood every year. (about 4-5 cords) I sell it 1/2 cord at a time. Since my piles are not uniform size, I measure it in the truck. In order to do this I pack it very tight. So, after I'm done stacking it for the buyer, it appears to be quite a bit more than a 1/2 cord. Customer is happy. I'm happy, I think. It got me wondering which was the accurate measurement... In the truck, or on the rack. Wood on the rack is more loosely stacked. If I were buying wood and my delivered stack measured a 1/2 cord, I'd be content. Of course, I'd be real happy if I was getting 1/2 cord + 10% more.