diff --git a/src/core/config/Categories.js b/src/core/config/Categories.js
index 69ef5155..8b828bc0 100755
--- a/src/core/config/Categories.js
+++ b/src/core/config/Categories.js
@@ -302,6 +302,7 @@ const Categories = [
         ops: [
             "Entropy",
             "Frequency distribution",
+            "Chi Square",
             "Detect File Type",
             "Scan for Embedded Files",
             "Disassemble x86",
diff --git a/src/core/config/OperationConfig.js b/src/core/config/OperationConfig.js
index 38dad80b..1e975118 100755
--- a/src/core/config/OperationConfig.js
+++ b/src/core/config/OperationConfig.js
@@ -3205,6 +3205,13 @@ const OperationConfig = {
             }
         ]
     },
+    "Chi Square": {
+        module: "Default",
+        description: "Calculates the Chi Square distribution of values.",
+        inputType: "byteArray",
+        outputType: "number",
+        args: []
+    },
     "Numberwang": {
         module: "Default",
         description: "Based on the popular gameshow by Mitchell and Webb.",
diff --git a/src/core/config/modules/Default.js b/src/core/config/modules/Default.js
index 8e0c8872..a0e8bd23 100644
--- a/src/core/config/modules/Default.js
+++ b/src/core/config/modules/Default.js
@@ -143,6 +143,7 @@ OpModules.Default = {
     "Microsoft Script Decoder": MS.runDecodeScript,
     "Entropy":              Entropy.runEntropy,
     "Frequency distribution": Entropy.runFreqDistrib,
+    "Chi Square":           Entropy.runChiSq,
     "Detect File Type":     FileType.runDetect,
     "Scan for Embedded Files": FileType.runScanForEmbeddedFiles,
     "Generate UUID":        UUID.runGenerateV4,
diff --git a/src/core/operations/Entropy.js b/src/core/operations/Entropy.js
index 3451914d..aa9ed0bc 100755
--- a/src/core/operations/Entropy.js
+++ b/src/core/operations/Entropy.js
@@ -135,6 +135,31 @@ const Entropy = {
     },
 
 
+    /**
+     * Chi Square operation.
+     *
+     * @param {byteArray} data
+     * @param {Object[]} args
+     * @returns {number}
+     */
+    runChiSq: function(input, args) {
+        let distArray = new Array(256).fill(0),
+            total = 0;
+
+        for (let i = 0; i < input.length; i++) {
+            distArray[input[i]]++;
+        }
+
+        for (let i = 0; i < distArray.length; i++) {
+            if (distArray[i] > 0) {
+                total += Math.pow(distArray[i] - input.length / 256, 2) / (input.length / 256);
+            }
+        }
+
+        return total;
+    },
+
+
     /**
      * Calculates the Shannon entropy for a given chunk of data.
      *