Variance in Poker

Definition

Variance is the statistical measure of how much your results deviate from the expected value. In poker terms: it's the swings—the difference between what should happen mathematically and what actually happens in the short term.

High variance = Wild swings. Low variance = Steadier results.

Variance in Real Life

Imagine two players with identical win rates of $20/hour:

Over 1,000 hours, both make $20,000. But Player B's journey includes massive ups and crushing downs.

Why Variance Exists

🎲 Cards Are Random

You can be 80% favorite and still lose 20% of the time. Over 100 hands, you might lose 30 times instead of 20—that's variance.

💥 Big Pots Amplify Swings

When you get all-in, results become more extreme:

• Win → Big jump up
• Lose → Big drop down

The Variance Curve

Short-term results look random. Long-term results reveal your true edge.

Poker Example

You have A♠ A♥ vs K♣ K♦ all-in preflop.

Your equity: 82%

Over 100 such situations:

• Expected wins: 82
• Possible outcomes: 70-95 wins (variance!)
• Worst case possible: 65 wins (still losing 35 times)

Even with massive edges, you can run badly.

How to Handle Variance

✅ Do This

• Maintain proper bankroll management
• Focus on decision quality, not results
• Think in terms of long-term EV
• Take breaks during bad runs

❌ Avoid This

• Judging your play by short-term results
• Playing stakes you can't afford
• Tilting after bad beats
• Changing strategy based on recent losses

Variance Quick Facts

Key Takeaway

Variance is not your enemy—it's just math. Accept that short-term results don't reflect your skill. Focus on making +EV decisions, maintain a proper bankroll, and let the long run sort it out.