How College Basketball Tournament Brackets Work: A Beginner's Guide

Every spring, millions of people fill out brackets — even if they barely watch college basketball the rest of the year. But if you're new to the tournament or just want to understand the mechanics, the whole thing can feel overwhelming at first.

Here's the good news: brackets aren't complicated once you understand the basic structure. And if you're joining a bracket pool with friends, knowing how everything works makes the experience way more fun.

Let's break it down.

What Is a Tournament Bracket?

A bracket is your personal prediction sheet for the college basketball tournament. It's a visual map of every matchup, and your job is to pick the winner of each game — from the very first round all the way to the national championship.

Think of it like this: you're not actually playing in the tournament. You're making educated guesses (or lucky hunches) about which teams will win their games. The more games you predict correctly, the higher your score in your bracket pool.

The Tournament Structure: 68 Teams, 4 Regions

The tournament starts with 68 teams. But not all 68 start at the same time.

The First Four Games

Four of the lowest-ranked teams play in "First Four" play-in games that happen before the main bracket starts. The winners advance to the main 64-team bracket. That's why some brackets show 68 teams total, even though the primary bracket is 64.

The 64-Team Bracket

Once the First Four is done, you've got 64 teams divided into 4 regions: East, West, Midwest, and South. Each region has 16 teams.

This is the bracket you'll fill out in most pools.

How Seeding Works: The 1-16 Rankings

Each team gets a ranking called a seed. Seeds range from 1 to 16 in each region.

A #1 seed is the strongest team in that region. A #16 seed is the weakest. The tournament selection committee decides these rankings based on each team's regular season performance.

Here's the first-round matchup pattern:

• #1 seed vs. #16 seed
• #2 seed vs. #15 seed
• #3 seed vs. #14 seed
• #4 seed vs. #13 seed
• And so on, all the way down to #8 vs. #9

This is why the #1 seeds almost always win their first game — they're genuinely the best teams in the field. It's also why a 16-seed beating a 1-seed is so rare and exciting that it makes national headlines when it happens.

The Rounds Explained

Your bracket has six rounds of games. Here's what each one is called and how many teams are left:

Round 1 — Round of 64 All 64 teams play. That's 32 games across 4 regions.

Round 2 — Round of 32 The 32 winners from Round 1 keep playing. That's 16 games.

Round 3 — Round of 16 16 teams remain — four per region. Things start getting intense. That's 8 games.

Round 4 — Regional Finals Eight teams left, two per region. These games determine which teams advance to the national stage. That's 4 games.

Round 5 — National Semifinals The final four teams standing. Two games decide who plays for the championship. This is where legends are made.

Round 6 — National Championship One game. Two teams. One champion.

Each round eliminates half the remaining teams, which is why it's called single elimination — lose once and you're out.

How to Fill Out Your Bracket

Filling out a bracket is straightforward:

1. Look at each matchup in the Round of 64 (all 32 games).
2. Pick a winner for each game. You can base your picks on rankings, gut feeling, loyalty to your favorite school, or literally anything else.
3. Move your picks forward to the next round. If you picked Team A to beat Team B in Round 1, Team A moves into your Round of 32 bracket.
4. Continue through all six rounds until you've picked a national champion.
5. Submit your bracket before the first game tips off.

That's it. You've filled out a bracket.

One important thing to know: your picks cascade forward. If you pick a team to make it to the Regional Finals but they lose in Round 1, all of those later picks are automatically wrong too. This is what people mean when they say their "bracket got busted."

How Scoring Works in Bracket Pools

Different pools use different scoring systems. Here are the most common formats:

Standard Scoring

Points increase each round to reward correct picks that are harder to make:

• Round of 64: 10 points per correct pick
• Round of 32: 20 points
• Round of 16: 40 points
• Regional Finals: 80 points
• National Semifinals: 160 points
• Championship: 320 points

This means your championship pick alone is worth as much as all 32 first-round games combined. Getting the later rounds right matters far more than nailing every early matchup.

Upset Bonus Scoring

Some pools award extra points when you correctly pick a lower-seeded team to win (an upset). This rewards going out on a limb with bold picks.

Tiered Scoring

Some pools use a flat number of points per round regardless of seeding.

The bottom line: Always ask how your pool is scoring before you fill out your bracket. It might change your strategy. If upset bonuses are available, picking a few more underdogs becomes worth the risk.

Want to understand the differences between scoring formats? Check out our bracket strategy guide for a deeper dive.

How Bracket Pools Work With Friends

Most people fill out brackets in a bracket pool — a group of friends, family, or coworkers all competing against each other. Here's the typical flow:

1. Someone creates a pool and picks a scoring format.
2. They share an invite link with the group.
3. Everyone fills out their bracket independently.
4. All brackets are submitted before the tournament starts.
5. As games are played, the app automatically scores every bracket in real time.
6. A live leaderboard shows who's winning.
7. The person with the most points when the championship game ends wins the pool.

The fun part? Watching your friends' brackets fall apart when their picks go wrong, and celebrating when your risky upset call actually comes through. Head-to-head bracket comparisons, group chat, and live leaderboards make it feel like you're watching the games together even if you're in different cities.

Some pools have small entry fees, but plenty of pools are free — it's purely for bragging rights.

If you're thinking about running a pool at work, check out our guide on how to run the perfect office bracket pool.

Tips for First-Timers

Do a little homework, but don't overthink it. Look at team records and seedings. Watch a few games if you can. But this isn't a science — plenty of people win pools by going with their gut.

Don't just pick all the higher seeds. A bracket where every top seed wins looks exactly like everyone else's bracket. You need a few upsets to separate yourself from the pack. The 5 vs. 12 and 6 vs. 11 matchups are historically the most common upset spots.

But don't go too wild with upsets either. Picking a bunch of 14-seeds and 15-seeds to win multiple games is exciting, but statistically unlikely. Balance is key.

Pay attention to your champion pick. Because later-round picks are worth so many more points, getting your championship pick right is the single biggest factor in winning your pool.

Have fun with it. The real joy of bracket pools is the competition and conversation with friends. Compare brackets, talk trash, and enjoy the ride.

Frequently Asked Questions

How many games are in the tournament? The main bracket has 63 games (64 teams, single elimination). Including the First Four play-in games, there are 67 total.

Can I change my bracket after I submit it? Most pools lock your bracket once the first game tips off. No changes allowed after that. Make sure to submit before the deadline.

What if I don't know anything about basketball? That's perfectly fine. Some of the best brackets come from people who pick based on mascots, school colors, or which state they like best. Upsets are unpredictable by nature, which is what makes brackets so fun — nobody has an unfair advantage.

What does "picking chalk" mean? Chalk means picking all the higher-seeded (favored) teams to win. It's the safe approach. But because everyone tends to pick chalk, you usually need at least a few upsets in your bracket to win a competitive pool.

How many people do I need for a pool? A pool works with as few as 4 people, but 8-20 is the sweet spot. Big enough for real competition, small enough that everyone stays engaged.

Start Your First Bracket Pool

Now that you know how brackets work, you're ready to jump in. Create a free bracket pool on SuperBrackets, share the invite link with your friends, and see who really knows their basketball.

The tournament comes around once a year. Don't miss it.

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