Hi-Lo is a balanced level-one count. Track 2–6 as +1, 7–9 as 0, and tens through aces as −1; then divide the running count by estimated decks remaining. The result estimates composition—it does not predict the next hand or guarantee a session win.
Hi-Lo card values
| Cards | Tag | Action |
|---|---|---|
| 2, 3, 4, 5, 6 | +1 | Add one |
| 7, 8, 9 | 0 | No change |
| 10, J, Q, K, A | −1 | Subtract one |
The tags sum to zero over a complete deck, which is why Hi-Lo is called balanced. If every card is seen and every update is correct, the running count returns to zero.
Running-count example
Start at zero. For 5, K, 2, 8, A, 6 and Q, the sequence is +1, 0, +1, +1, 0, +1 and 0. The running count ends at zero. Include every exposed card: player hands, dealer cards and split or hit cards.
Convert to a true count
In a multi-deck game, divide the running count by the estimated decks remaining. A running count of +6 with about three decks left is a true count of approximately +2. A running count of +6 with one deck left is approximately +6; the same imbalance is more concentrated.
Choose and practice one rounding convention. Deck estimation and arithmetic errors can erase a small theoretical advantage.
What the true count tells you
A higher true count indicates that more high cards remain relative to low cards than the starting mix. High cards can help the player through 3:2 blackjacks, stronger doubles and insurance at sufficiently high indices, while also helping the dealer. The net value depends on the rules and the exact decision.
Betting and playing deviations
Basic strategy remains the foundation. A tested betting ramp expresses an estimated advantage; it does not create one. Playing deviations require a defined index set for the specific rules. Do not improvise deviations from the sign of the count.
Practice progression
- Memorize tags until each response is immediate.
- Count down one deck accurately and verify that it ends at zero.
- Use cancellation pairs to increase speed.
- Practice multi-deck discard estimation and true-count conversion.
- Add basic-strategy decisions, conversation and casino-speed distractions.
- Log every error; do not raise stakes to “test” an unmeasured skill.
Limits and casino response
Hi-Lo usually does not apply to independently reshuffled RNG hands, continuous shufflers or shoes cut too shallowly to support a usable spread. Mental counting is distinct from using a device, but casino rights and player protections vary by jurisdiction. A property may change conditions or stop play.
Further reading
Even accurate advantage play has variance. Use an affordable bankroll, understand risk of ruin and never treat a positive count as a promise about the next hand.
