Drill card counting in your browser. Learn the tag values with flash cards, count down a full deck against the clock, and practice turning a running count into a true count. Works with Hi-Lo, KO, Hi-Opt II, Omega II, Zen Count and Wong Halves.
KO and ReKO are unbalanced: you bet off the running count, so there is no true count drill.
| Tag | Cards |
|---|---|
| +1 | 2, 3, 4, 5, 6 |
| 0 | 7, 8, 9 |
| −1 | A, 10, J, Q, K |
The trainer runs entirely in your browser. Nothing is stored or sent anywhere, so scores reset when you reload.
Work through the drills in order. Move on only when the current one feels automatic.
Answer until you never hesitate. A 5 should read as "+1" and a King as "−1" the moment you see it. Watch the average time drop.
Start on Manual or Slow. In Hi-Lo a full deck must end at exactly 0. If you miss, open the review to see where your count drifted.
Step the pace up only after a few clean decks. Then switch to 2 or 3 cards per flip: a 5 and a King cancel out, so you can skip the arithmetic for the pair.
Balanced systems bet off the true count: running count divided by decks left. Practice until the division is instant. The true count calculator explains the formula.
Counting is only half the job. Learn the basic strategy chart, drill it in the basic strategy trainer, learn its count-based deviations, then put it all together in the app.
Hi-Lo is a balanced count. A deck has twenty +1 cards (2 to 6), twenty −1 cards (10s, faces and aces) and twelve neutral cards (7, 8 and 9). The tags cancel out, so a correct count of a full deck is always 0. That gives you a free self-check with any real deck.
KO is unbalanced: 7s count +1 too, so a full deck ends at +4. That is why KO starts below zero in a shoe and bets off the running count instead of a true count. Wong Halves is balanced but uses half-point tags, so its running count can land on values like +2.5.
Put one card aside face down and count the other 51. The count you finish on tells you the hidden card's tag: if Hi-Lo ends at +1, the hidden card is a 10 or an ace.
Counting Edge tracks the running count as you tap cards, converts it to a true count, and shows your edge, bet and strategy deviations live. Free and open source.
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