NiaJane,
I am 6'1". I just looked this information up yesterday, as I am contemplating putting a permanent cutting board (for cutting clothing patterns) in my basement.
I kind of feel silly. I have been in this rental house nearly two years, full basement (not a real nice one, but not horrible, either), and yet I have two ironing boards in my living room, that I put 1x4 boards across, then put a fold up cardboard cutting board on the boards. A height to size sheet of plywood on a piano hinge - would get the eyesore out of my living room.
http://www.apartmenttherapy.com/how-...dnesday-191112
Ideally, your elbow should be at 45* angle. (That's like 44 1/2" for me!!!)
But, for kneading bread, 2-3" lower than that. I would think the rotary cutting action similar to kneading bread, we need the leverage to push down on the cutter, perhaps even a bit lower.