DXA scan is pretty much the only way to do it accurately. Calipers, "smart" digital scales, and comparing yourself to diagrams online are all very poor methods

DXA scan is pretty much the only way to do it accurately. Calipers, "smart" digital scales, and comparing yourself to diagrams online are all very poor methods of checking bodyfat and should be considered to have somewhere around a +-10% error range. I found a guy in my city doing DXA scans for $80, I usually go get one done every six months or so.