The True Count, Explained

Why the running count is not enough

A running count of +6 means six extra high cards are waiting — somewhere. Spread across five remaining decks, that surplus is thin soup. Concentrated in a deck and a half, it is dinner. The same running count means different things at different depths, so the number you bet from has to account for how much shoe remains.

The divider

The conversion is one division: true count = running count ÷ decks remaining. The number of decks you started with minus the decks in the discard tray equals the decks remaining — that subtraction is the whole operation. At a real table you cannot see inside the shoe, so you read the discard tray by eye and subtract. That estimate is a skill of its own, and it is trainable: real trays, real stacks, quarter-deck precision.

Truncate toward zero

This system drops the fraction — rounding toward zero, for negative counts as well as positive. A computed +2.7 plays as +2; a −2.7 plays as −2. One convention, applied everywhere, so your bets and your practice grade against the same arithmetic. Conventions differ across books; what matters is picking one and being consistent, and this is ours, stated plainly.

Training the whole chain

Count → tray read → divide → truncate is a chain, and chains break at their weakest link. The free true-count trainer on this site shows you a real tray photograph, takes your read, does the subtraction with you, and then asks for the true count — grading each link separately so a tray miss doesn't hide an arithmetic miss.

Questions

How accurately do I need to estimate the discard tray?

Half-deck accuracy is the working standard the eye can actually hold at a table, and quarter-deck steps are what you train against. Perfect is not on the menu; consistent is.