Mining output is only promised in watt, not in hashes. One token is 1 watt (iirc), and it will depend on the hardware and their skills how many hashes that is. Promising wattage makes a lot of sense, imo, because it's pretty easy to calculate and gives the holders a huge advantage over fixed hashes, because those will quickly become unprofitable, while the hashes/watt should increase over time (if only slightly). Correct me if I'm wrong.

If you are referring to the calculator on the website, that's just a gimmick and basically pointless. For example, it starts with a fixed difficulty and it doesn't increase over time. It's very static and rough. Don't rely on it.