What Is a Heater in Poker?
A heater is a hot run of winning sessions. It can look exactly like improvement until the cards cool off, which is why graphs need context.
A heater is a stretch of sessions where everything lands: your sets flop, your bluffs go through, and the coolers all fall your way. It is a variance upswing rather than a change in your win rate, and it lasts exactly as long as it lasts. Every winning player runs into them, and most misread what they mean.
What a heater looks like
You open A♥K♥ from the CO, the BB defends, and the flop comes K♠K♦7♣. You get paid on three streets. Next orbit Q♣Q♠ holds against A♦K♦, and an hour later 8♠8♦ flops a set into an overpair. Nothing you did was wrong, but nothing you did produced those boards either.
Zoom out and the maths is unremarkable. Standard deviation in 6-max no-limit sits around 100bb per 100 hands, so across 10,000 hands the noise in your observed win rate is roughly 10bb/100. A genuine 3bb/100 winner showing 13bb/100 over a fortnight is one standard deviation from expectation. Common, not miraculous.
Heater or real improvement
The difference does not show up in the graph. It shows up in the decisions behind it: a heater flatters the same game you were playing last month, while improvement changes what you do in identifiable spots.
| Signal | Heater | Real edge |
|---|---|---|
| Sample size | A few thousand hands | Tens of thousands |
| Where profit comes from | Showdowns you won | Thinner value, better folds |
| Survives a card change | No | Yes |
See your real expected win rate vs actual results
Sharkling's analytics separate the run-bad from the actual leaks, hand by hand, against a solver baseline.
Run the numbers before you conclude anything. The poker variance calculator shows the spread of results a given win rate produces over a given sample, and the width of that band is usually the whole answer.
What to do while it lasts
Do not move up because the graph told you to. A heater inflates your bankroll and your confidence at the same rate, and the confidence is the expensive half. Taking a shot at $2/$5 on the strength of 8,000 good hands means sitting down with borrowed evidence.
Do not widen your game either. The urge to press, opening 60% of hands from the CO because everything is working, turns a run of good cards into a leak that outlives the run. Keep the same ranges, bank the extra buy-ins, and expect the downswing on the other side to feel every bit as long and just as personal.
Related terms
- TiltTilt is emotion-driven bad play, usually after a beat. Spot the physical warning signs early and use a stop-loss before the decisions get expensive.
- Bad BeatA bad beat is losing after being a big favourite, like aces cracked by a river flush. The odds are real, and so are the rules behind bad beat jackpots.
- GrinderA grinder plays high volume for a modest edge, trusting sample size over big scores. The job is built on hours, win rates and bankroll discipline.
- SuckoutA suckout is when the underdog hits its outs on the turn or river. Two-outers still arrive often enough to keep the game profitable and painful.
- RakebackRakeback returns part of the rake you pay as cash or rewards. A strong deal can turn a break-even player into a winner over real volume.
See your real expected win rate vs actual results
Sharkling's analytics separate the run-bad from the actual leaks, hand by hand, against a solver baseline.
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