3 small (14") Black Locust tree's, and one big o'le 25" Oak tree. Now bucked 18" and stacked as rounds. I'm done for a few years(ok, yes I said that a few weeks ago!), have absolutely no more storage left, and 5 cords split and stacked. Man, those oak rounds were HEAVY. One thing I found out yesterday, I have been over estimating my tree/round sizes! I thought this was a 30-35" Oak treek at the base. I measured it with a tape and it was only 25". I wonder how many here are also over-estimating tree diameters? These 25" x 18" rounds could not be lifted. 200-300 lbs? Anyway, so the back row which is almost all Black Loucst, measures 12' long by 8' tall, by 18" thick. How much wood will that make when split? Is there a rounds stack cord calculator estimator somewhere?