♠ Card Games Encyclopedia

HUD Stats Calculator

A Heads-Up Display (HUD) is an essential tool for online poker players, overlaying real-time statistics on your table. This calculator helps you understand, calculate, and interpret key HUD statistics like VPIP, PFR, 3-Bet%, Aggression Factor, WTSD, and WWSF. Whether you're analyzing your own play or profiling opponents, understanding these metrics is crucial for developing winning strategies.

According to research from the Carnegie Mellon University AI research, which developed the poker-playing AI Libratus, statistical analysis and opponent modeling are fundamental to optimal poker strategy. HUD stats provide the data foundation for making better decisions at the table, helping you identify player tendencies and exploit weaknesses in their game.

Calculate & Analyze HUD Statistics

Sample size of tracked hands
Excluding forced blinds
Open raises + 3-bets + 4-bets
Chances to 3-bet
Re-raises pre-flop
Post-flop aggressive actions
Post-flop calls made
Hands where flop was seen
Hands that reached showdown
Hands won when shown
Won when opp. folded after flop

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Enter direct HUD stats to get a player profile analysis.

Select a stat to learn what it means and how to interpret different values.

Select a Statistic Above

Click on any stat button to see a detailed explanation of what it measures, how it's calculated, and what different values indicate about a player's style.

Understanding HUD Statistics

A HUD (Heads-Up Display) overlays real-time statistics on your online poker table, displaying information about your opponents based on their tracked hand history. According to research published in the Artificial Intelligence journal on poker strategy, statistical analysis of opponent tendencies is a fundamental component of game-theoretic optimal play. Understanding these stats helps you make better decisions at every street.

Core HUD Statistics Explained

  • VPIP (Voluntarily Put In Pot): The percentage of hands a player voluntarily enters. Excludes posting blinds. Shows how loose or tight someone plays.
  • PFR (Pre-Flop Raise): How often a player raises pre-flop. The VPIP-PFR gap reveals passive vs aggressive tendencies.
  • 3-Bet %: How often a player re-raises when facing a raise. Higher indicates aggression or a polarized range.
  • AF (Aggression Factor): Ratio of bets+raises to calls post-flop. Higher AF = more aggressive.
  • WTSD (Went To ShowDown): Percentage of flops seen that went to showdown. High WTSD = calling station tendencies.
  • W$SD (Won $ at ShowDown): Showdown win rate. Below 48% often indicates weak hand reading.
  • WWSF (Won When Saw Flop): Total win rate when seeing flop, including folds. Measures overall post-flop success.

Player Type Classification

Using HUD stats, players are commonly classified into archetypal categories. The Two Plus Two poker forums, one of the largest poker strategy communities, developed many of these classification systems that are now industry standard.

TAG (Tight-Aggressive)

VPIP: 18-24%

PFR: 15-21%

AF: 2.5-4.0

Most profitable style. Plays few hands but aggressively. Difficult to exploit.

LAG (Loose-Aggressive)

VPIP: 26-34%

PFR: 22-30%

AF: 3.0-5.0

High-variance style. Puts pressure on opponents. Requires skill to execute profitably.

Nit

VPIP: 8-15%

PFR: 6-13%

AF: 2.0-3.5

Only plays premium hands. Predictable and exploitable. Fold to aggression.

Fish/Recreational

VPIP: 40-65%

PFR: 5-15%

AF: 0.5-1.5

Loose-passive. Calls too much, rarely raises. Value bet relentlessly.

Maniac

VPIP: 45-70%

PFR: 35-55%

AF: 4.0+

Hyper-aggressive. Raises everything. Trap with strong hands, tighten up.

Calling Station

VPIP: 35-55%

PFR: 5-12%

WTSD: 38-50%

Calls everything, never folds. Never bluff. Value bet thin.

Sample Size Considerations

HUD statistics are only reliable with sufficient sample sizes. According to statistical analysis from Primedope's variance research, different stats require different sample sizes to become meaningful:

Statistic Minimum Hands Reliable Sample Notes
VPIP 50-100 300+ Converges relatively quickly
PFR 50-100 300+ Similar to VPIP convergence
3-Bet % 200-300 500+ Situational stat, needs more data
AF 300-500 1000+ High variance in post-flop play
WTSD% 500-1000 2000+ Requires many showdowns
W$SD% 500-1000 2000+ Win rate at showdown volatile

The VPIP-PFR Gap

The gap between VPIP and PFR is one of the most revealing metrics in poker. This gap represents hands where a player limps or calls a raise rather than raising themselves. A large gap indicates passive, calling-oriented play, while a small gap indicates aggressive, raising-oriented play.

  • Gap of 0-3%: Very aggressive. Player rarely limps or cold-calls. Strong, exploitative style.
  • Gap of 4-6%: Healthy balance. Some cold-calling of strong hands in position.
  • Gap of 7-10%: Somewhat passive. May be calling too much pre-flop.
  • Gap of 11%+: Very passive. Heavy limping or calling. Easy to exploit with aggression.

Using Stats for Exploitation

Once you identify a player type through their HUD stats, you can adjust your strategy to exploit their tendencies. The Upswing Poker strategy guides recommend specific counter-strategies for each player type:

Exploitation Strategies by Player Type

  • Against Nits: Steal their blinds relentlessly. Fold to their aggression unless you have the nuts.
  • Against LAGs: Widen your 3-bet range. Call down lighter. Let them bluff into you.
  • Against Fish: Value bet thinner and more often. Never bluff. Isolate them pre-flop.
  • Against Calling Stations: Never bluff. Value bet relentlessly, even thin. Bet-fold the river.
  • Against Maniacs: Tighten your range. Trap with premiums. Let them hang themselves.

Related Tools & Resources

Combine HUD stats analysis with our other poker tools for comprehensive game improvement:

For more on HUD usage and interpretation, the National Council on Problem Gambling recommends using analytical tools responsibly as part of a healthy approach to poker. Remember that poker involves both skill and chance, and statistical analysis is just one component of successful play.

Frequently Asked Questions

What is VPIP in poker?

VPIP (Voluntarily Put money In Pot) is a poker statistic that measures the percentage of hands a player voluntarily puts money in the pot pre-flop, excluding the blinds. A typical VPIP for a solid player is 18-25% in 6-max games. Higher VPIP indicates a looser player, while lower VPIP indicates a tighter player.

What is a good PFR percentage in poker?

PFR (Pre-Flop Raise) measures how often a player raises pre-flop. A good PFR for winning players is typically 15-22% in 6-max games, slightly lower for full ring. The gap between VPIP and PFR should ideally be small (2-5%), indicating aggressive play. A large gap suggests too much passive calling.

How do you calculate Aggression Factor in poker?

Aggression Factor (AF) is calculated as (Bets + Raises) / Calls. An AF of 1.0 means equal bets/raises and calls. Winning players typically have an AF between 2.0-4.0. An AF below 1.5 indicates passive play, while above 4.0 may indicate excessive bluffing.

What is WTSD in poker HUD stats?

WTSD (Went To ShowDown) measures the percentage of hands a player goes to showdown when seeing the flop. Typical winning players have WTSD between 24-30%. A high WTSD (35%+) indicates a calling station, while low WTSD may indicate folding too much to aggression.

What do poker player types like TAG and LAG mean?

TAG (Tight-Aggressive) players have low VPIP (18-24%) but high aggression when they play. LAG (Loose-Aggressive) players have higher VPIP (26-32%) with high aggression. Nits are extremely tight (VPIP below 15%). Fish or recreational players typically have very high VPIP (40%+) with low aggression.