I agree 100% with Gabowman..........Treat the yardage in the tree stand the same as if you were on the ground, but be aware that from a tree stand, your arrow will pass through a target at a different angle. The higher you are in the stand, the harder it will be to get a two lung pass through shot....I hunt no higher than 15 - 18 feet so I can at least hit the top of the near side lung and hope to exit the bottom of the far side lung......