What Is a Poker HUD?

A poker HUD (heads-up display) is an on-screen overlay that shows live statistics about each opponent while you play online. The numbers are pulled from a database of previously recorded hands, so even against a stranger you get an instant read on how loose, aggressive, or passive they are. It’s the difference between guessing and knowing.

What a HUD actually shows

When you sit at an online table, the HUD floats a small box of numbers next to each player. Those numbers are tendencies measured across every hand the tracking software has seen that player take. A player who raises constantly and a player who only ever calls will look completely different at a glance, long before they show down a hand.

The HUD reads from a database the software builds in the background. The more hands it records, the more reliable each statistic becomes — which is why HUD stats on a brand-new opponent should be taken with a grain of salt.

The core stats and what they mean

You don’t need fifty stats. Four or five do most of the work. Here are the ones nearly every player keeps on their layout:

Stat	Full name	What it measures	Typical TAG value
VPIP	Voluntarily Put $ In Pot	How often they enter a pot preflop (looseness)	~22%
PFR	Preflop Raise	How often they raise preflop (aggression)	~18%
3-bet	Three-bet %	How often they re-raise a preflop raise	~7%
AF	Aggression Factor	Ratio of bets/raises to calls postflop	2–3
Fold to C-bet	Fold to continuation bet	How often they fold to a flop bet	~45%

The single most useful pairing is VPIP and PFR, usually written together as “22/18.” When the two numbers are close, the player raises most hands they play — a sign of a thinking, aggressive opponent. When VPIP is much larger than PFR (say 40/8), you’re looking at a loose-passive player who calls too much and rarely takes the lead. That gap alone tells you to value-bet relentlessly and bluff less.

A quick worked read

Say a player shows 45/6 with a Fold-to-C-bet of 65%. Reading the line:

• 45 VPIP — extremely loose, plays almost half their hands.
• 6 PFR — almost never raises, so their range is capped and weak.
• 65% fold to c-bet — they give up on the flop two-thirds of the time.

Conclusion: this is a calling station preflop who folds postflop. Against them you raise wider for value preflop, then fire a continuation bet on most flops — the math says they’ll fold often enough to print money, and when they don’t, your stronger range wins at showdown.

How to read stats responsibly

• Mind the sample. VPIP and PFR settle after a few hundred hands; situational stats like fold-to-3-bet need thousands. A “70% fold to 3-bet” over six hands is noise.
• Don’t tunnel on one number. Stats describe tendencies, not the current hand. A nit can still wake up with aces.
• Combine with position. A player’s range shifts by seat, so read their stats alongside where they’re acting from — see how position shapes ranges.
• Pair it with equity. Once you’ve put an opponent on a range, an equity calculator tells you how your hand fares against it.
• Color-code by type. Most layouts let you tint a player’s box once their stats stabilize — green for stations, red for aggressive regs — so you read the table at a glance instead of crunching numbers each hand.

The bottom line

A HUD turns the firehose of online hands into a readable opponent profile. Keep your layout lean, learn what VPIP/PFR combinations imply, and always weigh the sample size before you trust a number. For the database engine that powers all of this, read how tracking software works, or head back to the tools & software hub to see how the HUD fits the broader toolkit.