VPIP from SB

Overview

VPIP from SB (Voluntarily Put Money In Pot from the Small Blind) is a specialized poker tracking statistic that isolates a player's preflop aggression from the small blind. It is widely used by online players and solvers to evaluate how often a player enters the pot from one of the most challenging positions on the table.

Calculation

VPIP from SB is calculated as:

[VPIP](/term/vpip) from SB = (Number of hands from SB where player voluntarily put money in) / (Total hands dealt in SB) × 100%

A hand is counted if the player calls (completes the small blind), raises (including limping and then raising), or goes all-in. Folding is excluded. Note that posting the blind itself is not voluntary, so only additional chips count.

Typical Ranges

• Tight players: 15–25%
• **Balanced/nit-reg: 25–35%
• Aggressive/LAG: 35–50% or higher

These ranges differ significantly from overall VPIP because the small blind is a disadvantageous position post-flop—the player acts first on all remaining streets unless heads-up. Most strategies recommend playing fewer hands from the SB than from the button or cutoff.

Strategic Importance

Disadvantages of the Small Blind

• Poor position: Must act first post-flop.
• Incomplete information: The big blind can still act after you.
• Equity realization issues: Weak hands often cannot realize their equity out of position.

Common Adjustments

• Tighten range: Many pros fold weak offsuit broadways and low pairs.
• Prefer raising over calling: A limp (calling) from SB often allows the big blind to check and see a free flop, reducing your advantage when you have a strong hand. Raising puts pressure and can steal the blinds.
• Defend less against steals: When the button or cutoff raises, the SB’s defend range is tighter than from the big blind.

Reading Your Opponent

• A high VPIP from SB (>40%) indicates a player who is either too loose or unaware of positional disadvantage. They are likely exploitable post-flop with frequent checks/folds.
• A low VPIP (<20%) suggests a very tight SB, making it profitable for the button or cutoff to steal their blind more often.

Relationship to Other Stats

VPIP from SB is often compared with:

• Overall VPIP: Shows general looseness.
• PFR from SB: Indicates aggression from the position. A large gap between VPIP and PFR suggests frequent limping, which is generally suboptimal.
• Fold to Steal: How often the SB folds to a raise from later positions.

Limitations

• Sample size: SB occurs less frequently than other positions (only when you are in the blind), so a few hundred hands may not yield reliable data.
• Context matters: Heads-up tables or short-handed play affect SB dynamics.
• Opponent-dependent: GTO ranges vary with stack sizes and opponent tendencies.

Conclusion

VPIP from SB is a key metric for assessing a player’s preflop strategy in the worst position. High values often signal a leak, while low values may indicate unnecessary tightness. Combined with other stats, it helps identify profitable adjustments in blind battles.