IBJJF Weigh-In Rules Explained
Short answer: At IBJJF events, you weigh in before your opening fight, wearing your gi (or the No Gi uniform at no-gi events). You get one attempt. If you miss weight, you’re disqualified immediately. You can’t change divisions, and you don’t get a refund. Other organizations’ rules differ, so check your event’s weigh-in policy.
When you weigh in
At IBJJF events, you check your weight before your first fight.
In the official wording: "Before his/her first fight, the athlete will check his/her weight with the Gi." (IBJJF weigh-ins)
So the weigh-in is part of your match-day flow. Plan for it the way you’d plan for your warm-up or bracket call. You still have to make the scale before you can fight.
If this is your debut, the IBJJF tournament checklist walks through the rest of the day.
What you wear on the scale
At gi events, you weigh in wearing your gi. The rule reads: "All athletes should fight and weigh-in with the Gi." (IBJJF weigh-ins)
Other organizations’ rules differ, so check your event’s weigh-in policy.
At no-gi events, you weigh in "with the No Gi uniform." (IBJJF weigh-ins)
Whatever you wear on the scale is part of your number, so note which uniform you weighed in. More on that in logging gi vs no-gi.
How many attempts
One. The IBJJF says there is a single opportunity to check the weight. (IBJJF weigh-ins)
There’s no second try. Whatever the scale reads on that attempt is your result.
What happens if you miss weight
The consequence is direct: "If the competitor does not make his/her weight, they will be immediately disqualified." (IBJJF weigh-ins)
Two more things follow from that:
- No division change. You can’t move to a heavier division on the spot.
- No refund. Your registration doesn’t come back to you.
The IBJJF puts it this way: "You can not change divisions... no refund." (IBJJF weigh-ins)
A missed weigh-in ends your day in that division.
Where to find your event’s official weight details
Division limits and measurement details can vary from event to event. For the official info on any IBJJF tournament, check that tournament’s "Important Info" section on its event page.
Read it when you register, and again as the date gets close. If something isn’t clear, ask the organizer before you travel.
Picking a division you can make
Track your weight against your division’s limit (from the event page) over time, and decide on a division with your coach or doctor. Pick a division you can make reliably, not one that depends on a last-minute scramble.
Where Mat Quest fits
Mat Quest won’t step on the scale for you, but it keeps your number in view.
With Mat Quest’s weight-cut tools, you can:
- Log daily weigh-ins so you have a steady record, not a guess.
- See a 7-day rolling average that smooths out day-to-day swings.
- Watch a live countdown of pounds to your division limit so you always know the gap.
On the competition side, Mat Quest tournaments shows upcoming events as VS-screen countdowns. Your next event stays on screen like a fight you’re about to load into.
If you’re planning ahead for a specific event, the 3-week weight cut post covers how to think about your timeline. Talk through any plan with your coach or doctor.
FAQ
When is the IBJJF weigh-in?
Before your first fight. (IBJJF weigh-ins)
Do I weigh in with my gi on at IBJJF events?
Yes. At gi events, "All athletes should fight and weigh-in with the Gi." (IBJJF weigh-ins) Other organizations’ rules differ, so check your event’s weigh-in policy.
What do I wear to weigh in at an IBJJF no-gi event?
You weigh in "with the No Gi uniform." (IBJJF weigh-ins)
Can I try the scale again if I’m over?
No. The IBJJF allows one opportunity to check the weight. (IBJJF weigh-ins)
What happens if I miss weight at an IBJJF event?
You’re disqualified immediately. You can’t change divisions, and there’s no refund. (IBJJF weigh-ins)
Where can I find the weight limits for my tournament?
Check the "Important Info" section on that tournament’s IBJJF event page. Then use Mat Quest to track your daily weigh-ins against that limit.