3-Bet and 4-Bet in Poker: How Counting Works and When to Re-Raise
Short version: a 3-bet is a re-raise of the first voluntary raise preflop. It is called “3” because the big blind counts as the first bet, the open as the second, and your re-raise as the third; re-raising a 3-bet is a 4-bet. Rules do not require doubling — only a legal raise increment. Below: counting, a worked stack of bets, min vs habit sizes, value vs bluff ideas, facing a 3-bet, and 4-bet/5-bet notes. Examples are hypothetical / for illustration.
Counting: the big blind is the first bet
New players ask: “We only raised twice — why 3-bet?” Because the big blind is forced money and counts as layer one:
| Count | Name | What it is |
|---|---|---|
| 1-bet | Big blind | Forced preflop bet |
| 2-bet | Open | First voluntary raise |
| 3-bet | Re-raise | Raise of the open |
| 4-bet | Re-re-raise | Raise of the 3-bet |
| 5-bet | — | Raise of the 4-bet; at 100bb often an all-in |
- Calls do not add a layer: If someone opens and another player only calls, your raise is still a 3-bet. When there is already a cold call, that 3-bet is a squeeze.
- Postflop counting exists: First bet = 1, raise = 2, re-raise = 3-bet — but everyday talk usually reserves “3-bet” for preflop.
- Raise vs 3-bet: Raise is the action family; 3-bet is one layer inside it.
Related terms: glossary, preflop actions.
Hypothetical hand: 3-bet through 5-bet
6-max, blinds 0.5/1 bb, 100bb stacks (amounts in big blinds):
| Action | Layer | Pot after |
|---|---|---|
| SB 0.5bb, BB 1bb | 1-bet | 1.5bb |
| UTG/MP fold; CO opens to 2.5bb | 2-bet (open) | 4bb |
| BTN 3-bets to 7.5bb | 3-bet | 11.5bb |
| Blinds fold; CO 4-bets to 18bb | 4-bet | 27bb |
| BTN shoves 100bb | 5-bet | 119.5bb |
Each layer grows the pot quickly. After a 4-bet at 100bb, little room remains — the next raise is often all-in. Side pots after all-ins: all-in guide.
Minimum size vs habit size
Rule: match the last increment
In no-limit Hold'em, a raise’s increment must be at least as large as the previous bet/raise increment. Doubling is not required.
- Open from 1bb to 2.5bb (increment 1.5) → min 3-bet 4bb.
- Blind defense
- Open to 3bb (increment 2) → min 3-bet 5bb.
- If a 3-bet goes from 2.5bb to 7.5bb (increment 5), a min 4-bet is 12.5bb.
Full action rules: betting rules.
Habits: larger in practice
Minimum 3-bets are rare because they give excellent calling prices. Common teaching starting points:
| Spot | Common habit size | Why |
|---|---|---|
| In position (e.g. BTN vs CO) | ~3× the open | You act last postflop; smaller pot is still playable |
| Out of position (e.g. BB vs BTN) | ~3.5–4× | You act first later; charge more to discourage calls |
| Squeeze (open + caller) | Larger than a heads-up 3-bet | Extra money in the pot; price out two players |
| 4-bet | ~2.2–2.5× the 3-bet | Pressure while leaving some choices at 100bb |
These are starting habits — adjust for stack depth and opponent tendencies.
Why 3-bet: value and bluffs
Every raise aims to get called by worse (value) or fold out better (bluff). Same for 3-bets.
Value: grow the pot with premiums
| Range | Combos | Share of 1,326 |
|---|---|---|
| KK+ (AA, KK) | 12 | 0.90% |
| QQ+ and AK | 34 | 2.56% |
| JJ+ and AK | 40 | 3.02% |
| TT+, AK, AQ | 62 | 4.68% |
(Each pair = 6 combos; AK = 16: 4 suited + 12 offsuit.)
If you 3-bet only QQ+ and AK, you hold those hands only a couple of times per hundred deals — opponents learn that your re-raise is extremely strong and you get less value. That is why ranges often mix some bluffs.
Bluff 3-bets: suited wheel aces (illustration)
Hands like A5s / A4s are common teaching bluffs because:
- Blockers: Holding an ace reduces AA and AK combos in their range.
- Playability when called: You can still make flushes, straights, or two pair — not a dead hand.
Beginners should master value 3-bets first. Linear (strong continuum) vs polarized (nuts + bluffs) mixes are intermediate topics — against calling stations lean value-heavy.
Bluff 3-bet fold-equity sketch
Using the hand above: CO opens 2.5bb; you 3-bet on the button to 7.5bb. Pure-bluff simplification (you win nothing when called): risk 7.5bb to win 4bb already in the pot:
Needed folds ≈ 7.5 ÷ (7.5 + 4) ≈ 65%
- From the big blind 3-betting to 10bb versus a 2.5bb button open (SB folded): you already posted 1bb; this step risks 9bb more to win 4bb → roughly 69%. Larger out-of-position sizes raise the bar.
- Real hands keep equity when called, so the true fold requirement is lower — but if someone almost never folds, stick to value 3-bets.
Facing a 3-bet: fold, call, or 4-bet
You are CO; you open 2.5bb; button 3-bets to 7.5bb; blinds fold.
- Price: You need 5bb more; pot becomes 16.5bb after a call → ~30% equity in chip terms. That looks cheap, but you still play three streets out of position.
- Dominated broadway is dangerous: KQo versus AK is often a poor continue.
- Medium pairs vs AK: JJ vs AK is a coin-ish race preflop — often a continue versus wide 3-bets, but crushed by AA/KK/QQ. More matchups: odds.
Decision order: (1) their seat and 3-bet frequency; (2) domination risk; (3) position postflop; (4) stack depth. Beginner default versus tight 3-bettors: continue mainly QQ+ and AK; versus frequent 3-bettors you can add JJ/TT/AQ calls and fold most else.
4-bet and 5-bet: stacks get committed
Continue the example: CO 4-bets to 18bb.
- CO’s pure-bluff 4-bet sketch: risk ~15.5bb more to win 11.5bb → needs folds around 57%.
- BTN calling a 4-bet: add 10.5bb into ~37.5bb → ~28% equity price — still leaves awkward SPR.
- After a called 3-bet, remaining stacks are often ~5–6× pot; after a called 4-bet, closer to ~2× pot. Lower SPR means top pair often plays for stacks. See also table size notes on how many players.
At 100bb, 4-bet ranges are usually narrow (AA/KK plus few bluffs); 5-bets are mostly all-ins. Deeper stacks allow more layers; short stacks may shove as the 3-bet itself.
Common 3-bet mistakes
- Thinking 3-bets must double: Rules care about increments; 3×/4× are habits.
- 3-betting only AA/KK: Too transparent; flat-calling QQ/AK creates awkward postflop spots.
- Bluffing never-folders: Pure-bluff thresholds are often 60%+ folds — unreachable versus calling stations.
- Tiny out-of-position 3-bets: Great price for them, then you act first.
- Calling with dominated hands: KQo/AJo versus tight 3-bets often face better aces and kings.
- No postflop plan: 3-bet pots have lower SPR — decide before you click raise.
Examples use bb units and hypothetical lines. Equity sketches are for illustration. CC Poker chips are entertainment only: they cannot be gifted or exchanged for cash or goods. 18+ only.
Related
FAQ
What does 3-bet mean in poker?
A 3-bet is a re-raise of the first voluntary raise preflop. Counting the big blind as the first bet (1-bet), the open is the second (2-bet), and the next raise is the third — a 3-bet. Another raise is a 4-bet, then a 5-bet.
How is a 3-bet different from a raise?
Raise is the general action. A 3-bet is a specific layer: the first re-raise after an open. Every 3-bet is a raise; not every raise is a 3-bet.
Must a 3-bet be a double?
No. Rules only require the raise increment to be at least as large as the previous raise increment. If they open 1bb to 2.5bb (increment 1.5bb), a min 3-bet is 4bb. Habit sizes of ~3× in position or ~3.5–4× out of position are habits, not laws.
What is the minimum legal 3-bet?
At least the opener’s amount plus their last raise increment. Example: blinds 0.5/1, open to 3bb (increment 2bb) → min 3-bet 5bb; open to 2.5bb → min 4bb.
What is the difference between a 3-bet and a 4-bet?
A 3-bet re-raises the open; a 4-bet re-raises the 3-bet. At ~100bb, a 5-bet is usually an all-in.
Is 3-bet only a preflop word?
Most everyday use is preflop. Postflop you can count the same way (first bet = 1, raise = 2, re-raise = 3-bet), but people usually just say raise / re-raise.
Which hands make sense for value 3-bets?
A simple beginner value core is QQ, KK, AA, and AK — 34 combos, about 2.56% of 1,326 starting combinations. Experienced players mix in some bluff 3-bets (for example suited wheel aces).
What should I do when I get 3-bet?
Fold, call, or 4-bet. Check their seat and how often they 3-bet, whether your hand is dominated, and whether you will be in position postflop. Beginners can continue mainly with QQ+ and AK versus tight 3-bettors.
What is a squeeze?
When someone opens and at least one player cold-calls, your re-raise is still a 3-bet — called a squeeze. The pot already has extra dead money, so squeezes are often sized larger than a heads-up 3-bet.