Card counting is not memorizing every card that's been dealt. It's a simple point-tracking system you run in your head, one number at a time, to know whether the deck favors the player or the dealer. Here's the whole process, step by step.
The Core Idea
A blackjack shoe with lots of high cards (10s, face cards, and Aces) left in it favors the player — you're more likely to be dealt a blackjack (which pays 3:2) and the dealer is more likely to bust drawing to a stiff hand. A shoe loaded with low cards favors the dealer. Counting cards means tracking that balance so you know when to bet big and when to bet the table minimum.
Step 1: Learn a Point System
Every counting system assigns a point value to each card rank. The most common beginner system, the Hi-Lo count, works like this:
| Cards | Value |
|---|---|
| 2, 3, 4, 5, 6 | +1 |
| 7, 8, 9 | 0 |
| 10, J, Q, K, A | -1 |
Low cards are good for the player when they're gone (so they count +1 when dealt — meaning more high cards remain), and high cards are bad for the player when they're gone (so they count -1).
Our Easy Red 7 counter and Uston SS counter automate this exact tracking if you want to practice with software before doing it by hand.
Step 2: Track the Running Count
As each card is dealt, add its value to a running total in your head. Start at 0 at the beginning of a fresh shoe. If a 4, a King, and a 7 come out, your running count goes +1, -1, 0 — net 0. That's the "running count."
Step 3: Convert to the True Count
The running count alone isn't enough in a multi-deck shoe — a running count of +6 means a lot more in the last deck of an 8-deck shoe than it does with 6 decks still left. Divide the running count by the number of decks remaining to get the "true count":
true count = running count ÷ decks remainingMost players round to the nearest whole deck when estimating decks remaining — you don't need to be exact, just close.
Step 4: Adjust Your Bet Size
This is the entire point of counting: bet more when the true count is positive (the deck favors you) and bet the table minimum when it's zero or negative. A common beginner bet spread is 1 unit at a true count of +1 or below, scaling up to 4-5 units at +4 or higher. The spread — not any single hand — is where the edge comes from over thousands of hands.
Step 5: Still Play Correct Basic Strategy
Counting tells you when to bet more. It doesn't replace basic strategy — the mathematically correct play for every hand based on your total and the dealer's up card. A counter who ignores basic strategy gives back most of the edge counting provides. Some plays do shift slightly at extreme counts (index plays), but that's an advanced refinement, not where to start.
Practicing Without Giving Yourself Away
New counters make two mistakes: counting out loud (even mouthing numbers) and making their bet spread too obvious — flat-betting the minimum for twenty hands, then suddenly jumping to max bet. Practice the running count with a single deck of cards at home, dealt face-up one at a time, until you can keep an accurate count without visibly concentrating. Then practice the true-count conversion. Only after both are automatic should you try it at a table — live or online.
Is It Worth Learning?
Correctly executed, card counting turns a house edge of roughly -0.5% into a player edge of around +0.5% to +1.5%. That's a real, sustainable edge — but it only shows up over thousands of hands, and it requires discipline with both the count and your bankroll. It is not a way to guarantee winning any single session.
Practice With Software
Manually tracking a running and true count while also playing correct basic strategy is a lot to do at once when you're starting out. Our free card counting software and online counter track the count for you in real time, so you can build the habit before doing it entirely by hand.