How IBJJF weigh-ins work (and how to avoid a DQ)
More first-timers get disqualified at the scale than in any match — almost always over the same avoidable mistake. Here's how IBJJF weigh-ins really work.
You weigh in wearing your gi
For gi divisions, IBJJF weigh-ins are conducted with your full competition kimono and belt on. The division limit includes that weight. A pearl-weave gi adds roughly 1.5–2 kg and a heavier double-weave more, so the number that matters is your weight dressed to compete — not what your bathroom scale says in the morning.
Same-day, single chance
IBJJF typically weighs competitors on the day of competition, usually shortly before the division runs. In most cases it's one shot: if you're over, you're disqualified, often without a refund. There's no day-before weigh-in and 24-hour rehydration window like some no-gi promotions use.
Confirm before you compete
IBJJF rules and division limits are updated periodically and individual events can have exceptions. Always check the current official rule book at ibjjf.com and your event's published rules.
How to never get caught out
Weigh yourself at home in your actual competition gi several days before the event, and again the night before. Account for the gi you'll actually wear — if you've been practising in a light gi but competing in a heavier one, that difference can be the kilo that DQs you. If you're sitting right on the limit, the safe move is to drop into the division up rather than gamble on the scale.
Confirm your division and the gi-on math with the weight class finder before you ever register.
Don't gamble at the scale
Check your gi-on weight against the verified limits before registration day.
Open the weight class finder