Whey is a unit of weight for butter and cheese.
[1][2] Whey (Essex) is exactly equal to 236 pounds (107 kg).
[1] 1 Whey (Essex) ≡ 59/56 Barrel[1] 1 Whey (Essex) ≡ 236 pounds[1] 1 Whey (Essex) ≡ 107.04779932 kg