In Texas Hold’em, an “Out” is any card left in the deck that will improve your hand to a likely winner. Knowing how many outs you have is the first step to calculating your Equity — your percentage chance of winning the hand.
Our Outs & Equity Calculator uses the famous “Rule of 4 and 2” to instantly translate your out count into a winning percentage. Compare this to your pot odds to make mathematically correct decisions at the table.
🃏 Poker Outs & Equity Calculator
Rule of 4 & 2📊 Pot Odds Quick Reference
| Bet Size | Pot Odds | Required Equity | Min Outs (Flop) |
|---|---|---|---|
| 25% pot | 5:1 | 16.7% | 4+ |
| 33% pot | 4:1 | 20% | 5+ |
| 50% pot | 3:1 | 25% | 6+ |
| 66% pot | 2.5:1 | 28.5% | 7+ |
| 75% pot | 2.3:1 | 30% | 8+ |
| 100% pot | 2:1 | 33% | 9+ (Flush) |
| 150% pot | 1.7:1 | 37.5% | 10+ |
| 200% pot | 1.5:1 | 40% | 11+ |
Click any row to load those outs into the calculator. Highlighted rows = common draws.
| Outs | Common Draw | Turn % | River % | Turn+River % | Odds |
|---|---|---|---|---|---|
| 1 | Runner-runner | 2.1% | 2.2% | 4.3% | 22:1 |
| 2 | Pocket pair → Set | 4.3% | 4.3% | 8.4% | 11:1 |
| 3 | One overcard | 6.4% | 6.5% | 12.5% | 7:1 |
| 4 | Gutshot straight | 8.5% | 8.7% | 16.5% | 5:1 |
| 5 | Pair → Two pair/Trips | 10.6% | 10.9% | 20.3% | 4:1 |
| 6 | Two overcards | 12.8% | 13.0% | 24.1% | 3.2:1 |
| 7 | Gutshot + overcard | 14.9% | 15.2% | 27.8% | 2.6:1 |
| 8 | Open-ended straight | 17.0% | 17.4% | 31.5% | 2.2:1 |
| 9 | Flush draw | 19.1% | 19.6% | 35.0% | 1.9:1 |
| 10 | Gutshot + flush | 21.3% | 21.7% | 38.4% | 1.6:1 |
| 11 | OESD + overcard | 23.4% | 23.9% | 41.7% | 1.4:1 |
| 12 | Flush + gutshot | 25.5% | 26.1% | 45.0% | 1.2:1 |
| 13 | Flush + pair | 27.7% | 28.3% | 48.1% | 1.1:1 |
| 14 | Big combo draw | 29.8% | 30.4% | 51.2% | 0.95:1 |
| 15 | Flush + OESD (monster) | 31.9% | 32.6% | 54.1% | 0.85:1 |
| 16 | Monster + overcard | 34.0% | 34.8% | 57.0% | 0.75:1 |
| 17 | Monster + pair | 36.2% | 37.0% | 59.8% | 0.67:1 |
| 18 | Huge combo | 38.3% | 39.1% | 62.4% | 0.60:1 |
| 19 | Mega combo | 40.4% | 41.3% | 65.0% | 0.54:1 |
| 20 | Maximum draw | 42.6% | 43.5% | 67.5% | 0.48:1 |
What is Poker Equity?
Equity is your mathematical share of the pot based on your probability of winning. If you have 40% equity, you expect to win the pot 40% of the time when the hand is played to showdown. Understanding equity is fundamental to profitable poker.
🎯 Outs
Cards remaining in the deck that will complete your winning hand.
📊 Equity
Your percentage chance of winning the pot at showdown.
💰 Pot Odds
The ratio between the bet you must call and the total pot size.
The relationship between these concepts determines whether calling, folding, or raising is the correct play.
The Rule of 4 and 2 Explained
The Rule of 4 and 2 is a quick mental math shortcut used by professional poker players to estimate equity during a hand.
📐 The Formula
On the Flop (2 cards to come)
Outs × 4 = Equity %
Example: 9 outs × 4 = 36%
On the Turn (1 card to come)
Outs × 2 = Equity %
Example: 9 outs × 2 = 18%
Why Does This Work?
With 47 unknown cards on the flop, each out represents roughly 2.1% per card. With 2 cards to come, that’s approximately 4.2% per out (rounded to 4). On the turn, with 46 unknown cards and 1 card to come, each out is roughly 2.2% (rounded to 2).
⚠️ Accuracy Note: When Does It Break Down?
The Rule of 4 and 2 slightly overestimates equity for large draws (12+ outs). For most common draws (4-10 outs), it’s accurate within 1-2%. For critical all-in decisions with big draws, consider the exact odds:
| Outs | Rule of 4 | Exact (Flop) | Difference |
|---|---|---|---|
| 4 | 16% | 16.5% | -0.5% |
| 8 | 32% | 31.5% | +0.5% |
| 9 | 36% | 35.0% | +1.0% |
| 12 | 48% | 45.0% | +3.0% |
| 15 | 60% | 54.1% | +5.9% |
| 20 | 80% | 67.5% | +12.5% |
Pro Tip: For draws with 10+ outs, use the modified formula: Outs × 4 – (Outs – 8) for better accuracy.
How to Use the Equity Calculator
This tool is a quick estimator designed for use during a hand or for post-session analysis.
- Count Your Outs: Look at your hand and the board. Count how many cards in the deck give you a strong winning hand.
- Tip: See the “Complete Outs Reference Table” below if you aren’t sure.
- Enter the Number: Input the total number of outs into the calculator (1-20).
- Select the Street:
- Flop: Choose this if there are still 2 cards to come (Turn and River). Uses ×4.
- Turn: Choose this if there is only 1 card to come (River). Uses ×2.
- Read Results: The calculator shows your approximate equity percentage.
- Compare to Pot Odds: If your equity is higher than your pot odds, calling is mathematically correct.
Complete Outs Reference Table
This table shows the exact probabilities for every out count from 1 to 20. Use it for precision when the stakes are high.
| Outs | Common Draw | Turn Only | River Only | Turn + River | Odds (X:1) |
|---|---|---|---|---|---|
| 1 | Runner-runner royal | 2.1% | 2.2% | 4.3% | 22:1 |
| 2 | Pocket pair → Set | 4.3% | 4.3% | 8.4% | 11:1 |
| 3 | One overcard | 6.4% | 6.5% | 12.5% | 7:1 |
| 4 | Gutshot straight | 8.5% | 8.7% | 16.5% | 5:1 |
| 5 | Pair → Two pair/Trips | 10.6% | 10.9% | 20.3% | 4:1 |
| 6 | Two overcards | 12.8% | 13.0% | 24.1% | 3.2:1 |
| 7 | Gutshot + overcard | 14.9% | 15.2% | 27.8% | 2.6:1 |
| 8 | Open-ended straight (OESD) | 17.0% | 17.4% | 31.5% | 2.2:1 |
| 9 | Flush draw | 19.1% | 19.6% | 35.0% | 1.9:1 |
| 10 | Gutshot + flush draw | 21.3% | 21.7% | 38.4% | 1.6:1 |
| 11 | OESD + overcard | 23.4% | 23.9% | 41.7% | 1.4:1 |
| 12 | Flush + gutshot | 25.5% | 26.1% | 45.0% | 1.2:1 |
| 13 | Flush + pair | 27.7% | 28.3% | 48.1% | 1.1:1 |
| 14 | Flush + OESD (overlap) | 29.8% | 30.4% | 51.2% | 0.95:1 |
| 15 | Flush + OESD (monster) | 31.9% | 32.6% | 54.1% | 0.85:1 |
| 16 | Monster + overcard | 34.0% | 34.8% | 57.0% | 0.75:1 |
| 17 | Monster + pair | 36.2% | 37.0% | 59.8% | 0.67:1 |
| 18 | Combo draw | 38.3% | 39.1% | 62.4% | 0.60:1 |
| 19 | Mega combo | 40.4% | 41.3% | 65.0% | 0.54:1 |
| 20 | Maximum draw | 42.6% | 43.5% | 67.5% | 0.48:1 |
Note: “Turn + River” column shows the probability of hitting your out on either card when seeing both streets (from the flop).
Common Outs Cheat Sheet
Memorize these common scenarios to speed up your play. Click to learn more about each draw type.
| Draw Type | Example | Outs | Flop Equity |
|---|---|---|---|
| 🃏 Flush Draw | 4 cards of same suit → need 5th | 9 | 35.0% |
| ↔️ Open-Ended Straight | 5-6-7-8 (needs 4 or 9) | 8 | 31.5% |
| 🎯 Gutshot Straight | 5-6-8-9 (needs only 7) | 4 | 16.5% |
| 👑 Two Overcards | AK vs board 8-5-2 | 6 | 24.1% |
| 👑 One Overcard | AJ vs board K-8-5 | 3 | 12.5% |
| 🎰 Set (Pocket Pair) | 77 on board A-K-3 | 2 | 8.4% |
| 💥 Flush + Gutshot | Combo draw (9 + 3 extra) | 12 | 45.0% |
| 🔥 Monster Draw | Flush + OESD (9 + 6 non-flush) | 15 | 54.1% |
Using Equity with Pot Odds
Knowing your equity is only half the battle. To make correct decisions, you must compare your equity to your pot odds.
✅ The Decision Rule
If your Equity % > Required Pot Odds % → CALL is profitable
If your Equity %
Pot Odds Formula
Required Equity = Bet to Call ÷ (Pot + Bet + Your Call)
Pot Odds Reference Table
Use this quick reference to know how much equity you need based on bet sizing:
| Opponent’s Bet | Pot Odds | Required Equity | Can Call With… |
|---|---|---|---|
| 25% pot (1/4) | 5:1 | 16.7% | Any 4+ outs |
| 33% pot (1/3) | 4:1 | 20% | 5+ outs |
| 50% pot (1/2) | 3:1 | 25% | 6+ outs |
| 66% pot (2/3) | 2.5:1 | 28.5% | 7+ outs |
| 75% pot (3/4) | 2.3:1 | 30% | 8+ outs |
| 100% pot (1x) | 2:1 | 33% | 8+ outs (OESD) |
| 150% pot (1.5x) | 1.7:1 | 37.5% | 9+ outs (flush) |
| 200% pot (2x) | 1.5:1 | 40% | 10+ outs only |
Example: Calling with a Flush Draw
Let’s walk through a complete example combining outs, equity, and pot odds.
📋 The Situation
Your Hand: J♠ T♠ (Jack and Ten of Spades)
The Flop: 2♠ 7♠ A♦
The Pot: $100
Opponent Bets: $75 (75% pot)
Step 1: Count Your Outs
You have a flush draw. There are 13 spades total. You have 2, and there are 2 on the board.
Remaining spades: 13 – 4 = 9 outs
Step 2: Calculate Your Equity
On the flop (2 cards to come): 9 outs × 4 = 36% equity
(Exact: 35.0%)
Step 3: Calculate Pot Odds
Required Equity = $75 ÷ ($100 + $75 + $75) = 75 ÷ 250 = 30%
Step 4: Compare & Decide
Your Equity (35%) > Required Equity (30%)
✅ CALL is profitable!
Over many hands, you will profit when calling with this draw at this price. Even though you’ll miss 65% of the time, the pot odds make it a +EV (positive expected value) play.
Advanced Concepts
🎯 Dirty Outs
A “Dirty Out” is a card that improves your hand but might give your opponent an even better hand. You should discount dirty outs from your calculation.
Example: You have 5♦6♦ and need a 7 to make a straight. But if the 7♥ comes and puts a third heart on the board, your opponent might have made a flush. Discount 1-2 outs in this case.
🔙 Backdoor Draws
A backdoor draw (runner-runner) requires hitting perfect cards on BOTH the turn AND the river. For example, having 3 hearts on the flop needs two more hearts to complete a flush.
Value: Backdoor draws add approximately 1-2 outs worth of equity. Don’t rely on them, but do factor them into close decisions.
💰 Implied Odds
Implied odds account for additional money you can win on later streets if you hit your draw. If your opponent will pay you off big when you complete your hand, you can call with slightly less immediate equity.
Example: Your pot odds require 30% equity, but you only have 25%. However, you have a hidden draw and expect your opponent to pay off another $200 if you hit. The extra implied value justifies the call.
🛡️ Blocker Cards
Sometimes you hold cards that block your opponent’s possible hands. For example, if you have the A♠ and are drawing to a flush, you block the nut flush — meaning your opponent can’t have it. This can increase the value of your draw.
Related Poker Calculators
- Pot Odds Calculator — Calculate if your call is profitable
- Poker Variance Calculator — Understand short-term swings
- ICM Calculator — Tournament equity calculations
- Nash Push/Fold Charts — Short stack strategy
- Rake & Rakeback Calculator — Calculate your true winrate
- Postflop EV Scenario Tool — Advanced EV analysis
Frequently Asked Questions (FAQ)
What is the “Rule of 4 and 2”?
It is a simple math shortcut used by poker professionals to estimate equity.
On the Flop (2 cards to come): Multiply outs by 4 to get percentage equity.
On the Turn (1 card to come): Multiply outs by 2 to get percentage equity.
Note: It slightly overestimates for huge draws (14+ outs), but is accurate enough for most decisions.
How many outs is a flush draw?
A flush draw has 9 outs. There are 13 cards of each suit in a standard deck. If you have 4 cards to a flush (2 in your hand + 2 on the board), there are 13 – 4 = 9 remaining cards of that suit that will complete your flush.
On the flop, 9 outs gives you approximately 35% equity to hit by the river.
How many outs is an open-ended straight draw?
An open-ended straight draw (OESD) has 8 outs. For example, if you have 5-6-7-8, you can complete your straight with any of the four 4s or any of the four 9s in the deck.
On the flop, 8 outs gives you approximately 31.5% equity to hit by the river.
How many outs is a gutshot straight draw?
A gutshot (inside) straight draw has 4 outs. For example, if you have 5-6-8-9, only the four 7s in the deck will complete your straight.
On the flop, 4 outs gives you approximately 16.5% equity.
How accurate is the Rule of 4 and 2?
The Rule of 4 and 2 is accurate within 1-2 percentage points for most common draws (4-10 outs). It slightly overestimates equity for large draws:
- 9 outs: Rule gives 36%, actual is 35.0% (1% off)
- 12 outs: Rule gives 48%, actual is 45.0% (3% off)
- 15 outs: Rule gives 60%, actual is 54.1% (6% off)
For critical all-in decisions with big draws, use the exact odds from our reference table.
What are “dirty outs”?
A “Dirty Out” is a card that improves your hand but might give your opponent an even better hand. For example, if you need a 7 to make a straight, but the 7♥ puts a third heart on the board, it might complete your opponent’s flush.
Solution: Discount 1-2 outs when your draw cards could improve villain’s hand more.
What are “backdoor” draws?
A backdoor draw (runner-runner) requires you to hit perfect cards on BOTH the Turn and the River. For example, having 3 hearts on the flop means you need runner-runner hearts to complete a flush.
Backdoor draws are worth approximately 1-2 outs of additional equity but shouldn’t be heavily relied upon.
How do I compare equity to pot odds?
Calculate your pot odds as: Bet ÷ (Pot + Bet + Your Call)
If your equity percentage is higher than the required pot odds percentage, calling is mathematically profitable.
Example: Pot is $100, opponent bets $50. Pot odds = 50 ÷ (100 + 50 + 50) = 25%. If you have 35% equity, you should call because 35% > 25%.
What are implied odds?
Implied odds consider the additional money you expect to win on later streets IF you hit your draw. If your opponent will pay off big when you complete your hand (especially a hidden draw), you can call with less immediate equity than pot odds require.
Strong implied odds situations: hidden draws, deep stacks, opponents who can’t fold.
How do I count outs with multiple draws?
Add the outs for each draw, but subtract any overlapping cards.
Example: Flush draw (9 outs) + Open-ended straight draw (8 outs). If 2 of the straight cards are the same suit as your flush, they overlap: 9 + 8 – 2 = 15 outs (not 17).
These “combo draws” are powerful and often have 50%+ equity.
What is equity in poker?
Equity is your mathematical share of the pot based on your probability of winning. If you have 40% equity against your opponent’s hand, you expect to win the pot 40% of the time over many hands when played to showdown.
Equity drives correct decision-making: call, fold, or raise based on whether your equity justifies the price.
Should I always call if I have enough outs?
Not necessarily. Even with sufficient equity, consider:
- Stack sizes: Can you lose your entire stack even if you hit (reverse implied odds)?
- Position: Will you face additional bets on later streets?
- Fold equity: Might raising be better than calling if opponent will fold?
- Draw quality: Is it the nuts or could you make second-best hand?