Why BoutHost asks for a number rather than a division, and what happens to it.
BoutHost does not ask a host which divisions their card will run, and does not ask you to pick one. You enter a number: the weight you intend to compete at.
The reason is a fact about the sport. A host cannot know which divisions a card will run until they know who has entered — so asking for "weight classes offered" on the create form asks a question nobody can answer yet, and then binds registration to the guess.
So the host sees the actual weights people have entered at, and matches from those.
Enter it in whichever you think in, and choose the matching unit. The two are equivalent — the same fighter, either way.
The unit toggle labels your number; it does not convert it. Type 150, switch the toggle to kg, and it is 150 kg — not 68. The form says so on screen. Converting a number while you are looking at it is a worse surprise than not converting it.
The limits we check are sanity checks in whichever unit you chose. They exist because people occasionally type a figure in stones. They are not eligibility.
On an event, you declare the weight you will compete at for that card.
On your profile, you record the weight you currently expect to make.
They are separate on purpose. Ticking the box when you enter an event copies your declaration to your profile; leaving it unticked does not.
Editing your profile later does not change a declaration you have already made on an event. A host may have matched you on it.
Your declared weight appears next to your name on the event's public competitor list, which anybody can see.
The list is ordered by declared weight, lightest first.
This is a deliberate decision and one that is kept under review: a declared weight is a body-weight measurement of a named person, and combat-sports entry lists include children. It is shown as a number rather than a rounded band because a host matchmakes from this page, and a band cannot be matched on.
Read the privacy policy before entering a young competitor.
Not an official weigh-in, and nothing verifies it. What happens at the scales on the day is between you, the host and the sanctioning body.