New Efficiency Calculator Added
This post is from 2009. It was written about events at the time and has not been updated since. For current guidance, see the card counting.
Thanks to some Flash wizardry by ChemMeister ICountNTrack, the site now has a Card Counting System Efficiency Calculator.
You can plug in any set of card counting tag values, and calculate the Betting Correlation (BC), Playing Efficiency (PE) and Insurance Correlation (IC).
Just what are these values? They tell you
- How effectively a card counting system predicts what you should bet (BC).
- How effectively the system allows you to vary your strategy decisions (PE).
- How effectively the system indicates when you should take insurance (IC).
The idea behind these calculations originated with Peter Griffin, and are detailed in his seminal work on the mathematics of blackjack, “The Theory of Blackjack”
As a point of reference, here are some values for popular counting systems:
| Counting | Tags | Values | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| System | A | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | T | BC | PE | IC |
| Hi-Lo | -1 | +1 | +1 | +1 | +1 | +1 | 0 | 0 | 0 | -1 | 0.97 | 0.51 | 0.76 |
| Hi-Opt I | 0 | 0 | +1 | +1 | +1 | +1 | 0 | 0 | 0 | -1 | 0.88 | 0.61 | 0.85 |
| Wong’s Halves | -1 | +0.5 | +1 | +1 | +1.5 | +1 | +0.5 | 0 | -0.5 | -1 | 0.99 | 0.57 | 0.72 |
| K-O | -1 | +1 | +1 | +1 | +1 | +1 | +1 | 0 | 0 | -1 | 0.98 | 0.55 | 0.78 |
Using the new Efficiency Calculator at BlackjackInfo, you can calculate these values for any card counting tag values that you want.
Ken Smith
Creator of Blackjackinfo.com, very few can rival Ken's experience and knowledge of blackjack. His blackjack resume includes winning numerous tournament winnings, making several TV appearances and authoring multiple books on blackjack tournament strategy. Discover more about Ken's background and how he got started here
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Just wanted to stop in and say that this is such a useful tool. I’ve used it numerous times to try and tweak the systems I use. It would never be possible without this site and qfit’s site.
Card counting can get very advanced, especially when you start to side count the aces. But just by following basic blackjack strategy and adding the simple techniques of counting cards you can bring your advantage way up.
Blackjackinfo.com is a very useful website for the casino player.I got the information about casino blackjack sites. Really its a nice web site.
That’s great! Card counting is pretty easy, but this is still a cool and useful calculator for blackjack. Nice work!