Blackjack Bet Spread — Sizing Bets by the Count

Counting only makes money if you bet more when you have the edge. Your bet spread is how you do that — the rule that turns a true count into a wager. Without a spread, a perfect count earns nothing.

The ramp

A simple, effective ramp ties your bet to the true count once it goes positive:

Units bet ≈ true count − 1   (minimum 1 unit, capped at your top bet)

So at true count +1 you bet the minimum, +3 you bet about 2 units, +5 about 4 units, and so on. The spread is the ratio of your top bet to your minimum — a "1-to-8 spread" means your biggest bet is 8× your smallest. Wider spreads earn more but draw more attention.

Bankroll and risk of ruin

Your unit size should come from your bankroll, not your nerve. Betting too large relative to your roll makes variance — not the house edge — the thing that busts you. A common guideline is a unit around 1/1000 of your bankroll for a moderate spread; the Kelly criterion formalizes this by sizing each bet in proportion to your edge, and most counters bet a fraction of full Kelly to cut swings.

Heat: why spreads are limited

Casinos watch for bet variation that correlates with the count. A 1-to-20 spread prints money on paper but gets you backed off fast. Real spreads (often 1-to-6 to 1-to-12, with cover) trade some EV for longevity. This is the practical ceiling on how much counting is worth at a given table.

Size from the exact edge

The ramp above approximates your advantage from the true count. Fullcount reports the exact pre-round EV from the live shoe, so you can see precisely how much edge a given count is really worth before deciding how big to bet:

A bet spread is the last piece of the counting workflow: learn Hi-Lo, convert to the true count, apply deviations, and ramp your bet with the edge.