How long will it take my kid to get their next belt?
Short answer: sixteen weeks. Every belt takes sixteen weeks at our gym. No faster, no exceptions, no matter how talented your kid is.
The full run from white belt to green-black belt is fourteen steps. Fourteen times sixteen weeks is fifty-six months. About four and a half years, assuming your kid shows up for every testing cycle and passes every time.
One caveat up front: it also depends how old they start. Our kids classes start at age 5. Later belt colors still have minimum ages, so a child who starts at 5 can hit those gates and wait no matter how fast they progress. More on that below.
That last part does a lot of work. Here is the whole system, plainly.
The Math
We test every eight weeks. Youth students are eligible for promotion every sixteen weeks, which is every other testing cycle. Each belt takes one sixteen-week block: roughly four months.
The ladder runs white, white-black, then three versions of each color: grey, yellow, orange, green. Each color comes as white stripe, solid, black stripe. Fourteen steps. Sixteen weeks each. Fifty-six months.
| Step | Belt | Time |
|---|---|---|
| 1 | White | 16 weeks |
| 2 | White-Black | 16 weeks |
| 3 | Grey-White | 16 weeks |
| 4 | Grey | 16 weeks |
| 5 | Grey-Black | 16 weeks |
| 6 | Yellow-White | 16 weeks |
| 7 | Yellow | 16 weeks |
| 8 | Yellow-Black | 16 weeks |
| 9 | Orange-White | 16 weeks |
| 10 | Orange | 16 weeks |
| 11 | Orange-Black | 16 weeks |
| 12 | Green-White | 16 weeks |
| 13 | Green | 16 weeks |
| 14 | Green-Black | 16 weeks |
Stripes Are the Checkpoints
Each belt has four stripes, and each stripe means something specific: hours on the mat, curriculum knowledge, sparring, and behavior.
The behavior stripe is the one parents ask about. It stays because a belt from our gym means the kid is a representative of a healthy, respectful gym culture and a healthy, respectful household. Stripes give kids checkpoints to keep them going. But an unearned belt only hurts a kid in the long run, so the checkpoints are real.
When a parent asks me when their kid gets the next belt, the answer is always the same: after testing, if they have all of their stripes and pass.
What Testing Looks Like
Testing week comes every eight weeks. The kid demonstrates the curriculum for the belt they are testing for, then spars. The higher the rank, the more rounds and the longer the rounds.
They do not have to win. They have to show rank-appropriate decision making: the right reactions, in the right positions, against someone who is resisting. A grey belt testing for yellow does not need to beat anyone. They need to look like a yellow belt while trying.
If a kid fails one section, there is a makeup testing day. Nerves are real and sometimes that is all it is. If they fail more than one section, they wait eight weeks and test again. That is not punishment. The belt has to mean the kid can do the work.
The Age Gates
The belt colors also carry minimum ages. Our kids classes start at age 5, and that is the floor we use here: a kid cannot hold a yellow belt before age seven, no matter how good they are. The fifty-six month math assumes the kid is old enough for each group. A child who starts at 5 will hit the yellow gate at seven and wait, so young starters run longer than fifty-six months through no fault of their own.
| Belt group | Minimum age |
|---|---|
| White | 5 |
| Grey-White, Grey, Grey-Black | 5 |
| Yellow-White, Yellow, Yellow-Black | 7 |
| Orange-White, Orange, Orange-Black | 10 |
| Green-White, Green, Green-Black | 13 |
Nobody Skips the Line
Every promotion at our gym runs on the same cadence. There is no fast track. The system is the system, and it moves at sixteen weeks per belt for everyone.
Parents sometimes ask why jiu-jitsu takes so much longer than karate, where kids collect a new belt every few months. The honest answer is that the belts measure different things. A karate belt often marks attendance and memorized forms. A jiu-jitsu belt marks what your kid can do to another kid who is trying to stop them. That takes mat time, and mat time cannot be compressed.
If you are still picking a gym, here is what to look for on the tour. Ask how promotions work before you sign anything. If nobody can explain the system plainly, there is no system.
What Happens at Sixteen
Kids belts end at sixteen. At our gym, a green belt becomes an adult blue belt. Then the adult clock starts, and the IBJJF sets the floor: minimum age sixteen for blue, eighteen for brown, nineteen for black, with minimum time in each belt along the way.
For adults, the folk wisdom says ten years to black belt. A 2025 survey of 1,948 practitioners put the real average at 13.3 years: 2.3 to blue, 5.6 to purple, 9.0 to brown. Ten years assumes perfect conditions. No injuries, no gym closures, no life getting in the way. Reality gets in the way.
And most people never finish the run. The widely repeated estimate is that about ten percent of white belts ever earn a blue belt, and about one percent of blue belts ever earn a black belt. Those are estimates, not measured data, but ask any coach and they will tell you the direction is right. Every timeline number only describes the people who stayed.
The Practical Version
If your kid trains twice a week, shows up for testing week, and keeps their stripes current, the next belt comes every sixteen weeks. Miss testing week and the clock pauses. That is the whole formula.
Parents worry about the kid who stalls at white belt for two years and gets discouraged. It does not happen here unless the parents stop bringing them to testing week. The weeks between testing are built to get the curriculum into the kids' bodies, not just their heads. A kid who shows up keeps moving.
Bring them to testing week. Ask the coach where your kid stands on stripes. Everything else takes care of itself.