diff --git a/api/controller.js b/api/controller.js
index 949731c..a9efaf1 100644
--- a/api/controller.js
+++ b/api/controller.js
@@ -16,6 +16,7 @@ exports.calculate = function(req, res) {
     'subtract': function(a, b) { return a - b },
     'multiply': function(a, b) { return a * b },
     'divide':   function(a, b) { return a / b },
+    'power':    function(a, b) { return Math.pow(a, b) },
   };
 
   if (!req.query.operation) {
diff --git a/public/client.js b/public/client.js
index 1c60f86..1227a95 100644
--- a/public/client.js
+++ b/public/client.js
@@ -33,6 +33,9 @@ function calculate(operand1, operand2, operation) {
         case '/':
             uri += "?operation=divide";
             break;
+        case '^':
+            uri += "?operation=power";
+            break;
         default:
             setError();
             return;
diff --git a/public/index.html b/public/index.html
index 400c454..33d4579 100644
--- a/public/index.html
+++ b/public/index.html
@@ -41,6 +41,7 @@
             <button class="btn" onClick="equalPressed()">=</button>
 
             <!-- TODO: Buttons -->
+            <button class="btn" onClick="operationPressed('^')">^</button>
           </div>
         </div>
       </div>