Card Counting Efficiency Calculator

This calculator allows you to determine the Playing Efficiency (PE), Betting Correlation (BC) and Insurance Correlation (IC) of any card counting system.

Just plug in the tag values for each card rank and click Calculate.

For example, for the popular Hi-Lo counting system, you would input the tag value -1 for Ace and Ten, and tag value +1 for 2-6. That shows the Hi-Lo count yields PE=0.5114, BC=0.9682, and IC=0.7601.

Sorry, but the Efficiency Calculator currently requires Flash, and your device doesn’t support that.

We hope to eventually publish a new version that will work on all devices. Subscribe to the mailing list if you want to be notified when it arrives.

  • Playing Efficiency (PE): This is a measure of how effectively a counting system can be used to vary strategy. 0.70 is an approximate cap on the highest possible PE for a single parameter counting system.
  • Betting Correlation (BC): This is a measure of how effective a system is in detecting the player’s advantage based on the remaining cards. It is based on how closely the card counting tags match up with the effect of removal of each card rank. Good BC values can approach 1.00.
  • Insurance Correlation (IC): This is a measure of how well a counting system indicates correct insurance betting decisions.

For much more on the technical details of card counting system efficiencies, see Peter Griffin’s book The Theory of Blackjack: The Compleat Card Counter’s Guide to the Casino Game of 21

8 comments on “Card Counting Efficiency Calculator

  • Hi
    I am using Knockout counting system with a mild success.
    In that book, there is a chart for basic strategy that is a little bit different than what I see everywhere else.
    In KO, for a pair of 2 or 3 against the dealers 2 or 3, the decision is to HIT,
    But I know that in almost all charts it is advised to split. what should I do here especially if I am playing win no-hole-card rule?

    • The difference is whether or not you are allowed to double after split. If yes, you should split 2s and 3s against a dealer 2 or 3. If no, then you should hit these hands instead. To get a specific chart for your exact game, see our Blackjack Basic Strategy Engine, and click Adjust the Rules.

  • Taterbuggy said:

    How would I calculate a side count of aces effect?

    • Sorry, I don’t have a good answer for that. Perhaps you could estimate it by calculating the PE without the Ace included (prorate the other indexes to make it still balanced), and then do the BE with the Ace included. I have never used Ace side counts, as I found them difficult to implement accurately for the relatively small gain. As a result, I have always used counts with the Ace included (either Hi-Lo or Halves, depending on the game.)

      • Taterbuggy replied:

        I do not know what other people do, but for a side count I simply insert a letter in front of the running count in my head.

        A-20, A-19, A-21 ect.

        Strangely it works.

        Thank you for the answer I am learning but know so little.
        The more I read the less I know.

    • I cannot think of a convenient way to estimate the correlations for Speed Count. I’m not a fan anyway, as these counts are quite weak. I think the KO count is a better choice for an easy count.

  • Philippe B said:

    Thank you.
    I agree. I use ReKO. It was mainly to calculate how weak Speed Count is.

Leave a Reply

A valid URL is required.

Advanced Formatting?

If you are familiar with HTML, you can use these tags and attributes in your comment:

<a href="" title=""> <abbr title=""> <acronym title=""> <b> <blockquote cite=""> <cite> <code> <del datetime=""> <em> <i> <q cite=""> <s> <strike> <strong>