Use this ICM calculator to convert tournament chip stacks into real-money equity based on payout structures, remaining players, and chip stacks. The Independent Chip Model (ICM) helps poker players make mathematically optimal decisions in high-pressure situations like the bubble and final table.
Calculate tournament equity instantly
Adjust for stack sizes and payout structure
Improve shove, call, and fold decisions
What is ICM in Poker?
The Independent Chip Model (ICM) is a mathematical model used in poker tournaments to estimate a player’s share of the prize pool based on their chip stack relative to other players.
Unlike cash games, tournament chips do not have a linear value. This means doubling your stack does not double your expected winnings. ICM accounts for this by factoring in payout structures and the probability of finishing in each position.
How This ICM Calculator Works
This calculator converts chip stacks into Expected Value (EV) by simulating how often each player finishes in each payout position.
To use it effectively, input:
Each player’s chip stack
The tournament payout structure
The calculator then outputs each player’s equity as a percentage of the total prize pool.
When Should You Use ICM?
ICM is most important in high-leverage tournament situations, including:
The bubble - when one player remains before payouts begin
Final tables - where payout jumps are significant
Short-handed play - where each decision has larger impact
In these spots, correct ICM decisions can dramatically increase your long-term tournament ROI.
ICM Strategy Tips
Understanding ICM leads to better strategic adjustments:
Play tighter when calling all-ins near the bubble
Apply pressure as a big stack against medium stacks
Avoid marginal spots when survival has significant value
Recognize payout jumps before making aggressive plays
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Server IP : 18.223.242.41 / Your IP : 216.73.216.206 Web Server : Apache System : Linux ip-172-26-5-222 6.1.0-51-cloud-amd64 #1 SMP PREEMPT_DYNAMIC Debian 6.1.177-1 (2026-07-16) x86_64 User : bitnami ( 1000) PHP Version : 8.3.25 Disable Function : NONE MySQL : OFF | cURL : ON | WGET : ON | Perl : ON | Python : OFF | Sudo : ON | Pkexec : OFF Directory : /opt/bitnami/apps/wordpress/wp-includes/
Current File : /opt/bitnami/apps/wordpress/wp-includes/class-wp-url-pattern-prefixer.php
<?php
/**
* Class 'WP_URL_Pattern_Prefixer'.
*
* @package WordPress
* @subpackage Speculative Loading
* @since 6.8.0
*/
/**
* Class for prefixing URL patterns.
*
* This class is intended primarily for use as part of the speculative loading feature.
*
* @since 6.8.0
* @access private
*/
class WP_URL_Pattern_Prefixer {
/**
* Map of `$context_string => $base_path` pairs.
*
* @since 6.8.0
* @var array<string, string>
*/
private $contexts;
/**
* Constructor.
*
* @since 6.8.0
*
* @param array<string, string> $contexts Optional. Map of `$context_string => $base_path` pairs. Default is the
* contexts returned by the
* {@see WP_URL_Pattern_Prefixer::get_default_contexts()} method.
*/
public function __construct( array $contexts = array() ) {
if ( count( $contexts ) > 0 ) {
$this->contexts = array_map(
static function ( string $str ): string {
return self::escape_pattern_string( trailingslashit( $str ) );
},
$contexts
);
} else {
$this->contexts = self::get_default_contexts();
}
}
/**
* Prefixes the given URL path pattern with the base path for the given context.
*
* This ensures that these path patterns work correctly on WordPress subdirectory sites, for example in a multisite
* network, or when WordPress itself is installed in a subdirectory of the hostname.
*
* The given URL path pattern is only prefixed if it does not already include the expected prefix.
*
* @since 6.8.0
*
* @param string $path_pattern URL pattern starting with the path segment.
* @param string $context Optional. Context to use for prefixing the path pattern. Default 'home'.
* @return string URL pattern, prefixed as necessary.
*/
public function prefix_path_pattern( string $path_pattern, string $context = 'home' ): string {
// If context path does not exist, the context is invalid.
if ( ! isset( $this->contexts[ $context ] ) ) {
_doing_it_wrong(
__FUNCTION__,
esc_html(
sprintf(
/* translators: %s: context string */
__( 'Invalid URL pattern context %s.' ),
$context
)
),
'6.8.0'
);
return $path_pattern;
}
/*
* In the event that the context path contains a :, ? or # (which can cause the URL pattern parser to switch to
* another state, though only the latter two should be percent encoded anyway), it additionally needs to be
* enclosed in grouping braces. The final forward slash (trailingslashit ensures there is one) affects the
* meaning of the * wildcard, so is left outside the braces.
*/
$context_path = $this->contexts[ $context ];
$escaped_context_path = $context_path;
if ( strcspn( $context_path, ':?#' ) !== strlen( $context_path ) ) {
$escaped_context_path = '{' . substr( $context_path, 0, -1 ) . '}/';
}
/*
* If the path already starts with the context path (including '/'), remove it first
* since it is about to be added back.
*/
if ( str_starts_with( $path_pattern, $context_path ) ) {
$path_pattern = substr( $path_pattern, strlen( $context_path ) );
}
return $escaped_context_path . ltrim( $path_pattern, '/' );
}
/**
* Returns the default contexts used by the class.
*
* @since 6.8.0
*
* @return array<string, string> Map of `$context_string => $base_path` pairs.
*/
public static function get_default_contexts(): array {
return array(
'home' => self::escape_pattern_string( trailingslashit( (string) wp_parse_url( home_url( '/' ), PHP_URL_PATH ) ) ),
'site' => self::escape_pattern_string( trailingslashit( (string) wp_parse_url( site_url( '/' ), PHP_URL_PATH ) ) ),
'uploads' => self::escape_pattern_string( trailingslashit( (string) wp_parse_url( wp_upload_dir( null, false )['baseurl'], PHP_URL_PATH ) ) ),
'content' => self::escape_pattern_string( trailingslashit( (string) wp_parse_url( content_url(), PHP_URL_PATH ) ) ),
'plugins' => self::escape_pattern_string( trailingslashit( (string) wp_parse_url( plugins_url(), PHP_URL_PATH ) ) ),
'template' => self::escape_pattern_string( trailingslashit( (string) wp_parse_url( get_stylesheet_directory_uri(), PHP_URL_PATH ) ) ),
'stylesheet' => self::escape_pattern_string( trailingslashit( (string) wp_parse_url( get_template_directory_uri(), PHP_URL_PATH ) ) ),
);
}
/**
* Escapes a string for use in a URL pattern component.
*
* @since 6.8.0
* @see https://urlpattern.spec.whatwg.org/#escape-a-pattern-string
*
* @param string $str String to be escaped.
* @return string String with backslashes added where required.
*/
private static function escape_pattern_string( string $str ): string {
return addcslashes( $str, '+*?:{}()\\' );
}
}
