diff --git a/Pet Age Calculator/manifest.json b/Pet Age Calculator/manifest.json
new file mode 100644
index 00000000..98a9e072
--- /dev/null
+++ b/Pet Age Calculator/manifest.json	
@@ -0,0 +1,13 @@
+{
+  "manifest_version": 3,
+  "name": "Pet Age Caclulator",
+  "description": "Pet Age Caclulator",
+  "version": "1.0",
+  "permissions": [
+    "storage"
+  ],
+  "host_permissions": ["*://*/*"],
+  "action": {
+    "default_popup": "popup.html"
+  }
+}
diff --git a/Pet Age Calculator/popup.html b/Pet Age Calculator/popup.html
new file mode 100644
index 00000000..9c0d3759
--- /dev/null
+++ b/Pet Age Calculator/popup.html	
@@ -0,0 +1,30 @@
+<!DOCTYPE html>
+<html lang="en">
+<head>
+    <meta charset="UTF-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <title>Pet Age Calculator</title>
+    <link rel="stylesheet" href="style.css">
+</head>
+<body>
+    <div class="container">
+        <h1>Pet Age Calculator</h1>
+        <form id="ageForm">
+            <label for="petType">Select Pet:</label>
+            <select id="petType" required>
+                <option value="dog">Dog</option>
+                <option value="cat">Cat</option>
+                <option value="rabbit">Rabbit</option>
+                <option value="fish">Fish</option>
+            </select>
+            
+            <label for="humanYears">Enter Human Years:</label>
+            <input type="number" id="humanYears" step="0.1" min="0" required>
+            
+            <button type="submit">Calculate Pet Age</button>
+        </form>
+        <div id="result"></div>
+    </div>
+    <script src="script.js"></script>
+</body>
+</html>
diff --git a/Pet Age Calculator/script.js b/Pet Age Calculator/script.js
new file mode 100644
index 00000000..0a10bcb4
--- /dev/null
+++ b/Pet Age Calculator/script.js	
@@ -0,0 +1,26 @@
+document.getElementById('ageForm').addEventListener('submit', function(event) {
+  event.preventDefault();
+  
+  const petType = document.getElementById('petType').value;
+  const humanYears = parseFloat(document.getElementById('humanYears').value);
+  let petYears = 0;
+  
+  switch(petType) {
+      case 'dog':
+          petYears = humanYears * 7;
+          break;
+      case 'cat':
+          petYears = humanYears * 6;
+          break;
+      case 'rabbit':
+          petYears = humanYears * 12; 
+          break;
+      case 'fish':
+          petYears = humanYears * 5; 
+          break;
+      default:
+          petYears = 0;
+  }
+  
+  document.getElementById('result').textContent = `Your ${petType} is ${petYears.toFixed(1)} years old in pet years.`;
+});
diff --git a/Pet Age Calculator/style.css b/Pet Age Calculator/style.css
new file mode 100644
index 00000000..ea2f5f24
--- /dev/null
+++ b/Pet Age Calculator/style.css	
@@ -0,0 +1,59 @@
+body {
+  font-family: Arial, sans-serif;
+  display: flex;
+  justify-content: center;
+  align-items: center;
+  height: 100vh;
+  background-color: lightblue;
+  margin: 0;
+}
+
+.container {
+  background-color: #fff;
+  padding: 20px;
+  border-radius: 8px;
+  box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
+  text-align: center;
+  width: 50vw;
+}
+
+h1 {
+  margin-bottom: 20px;
+}
+
+form {
+  display: flex;
+  flex-direction: column;
+  align-items: flex-start;
+}
+
+label {
+  margin: 10px 0 5px;
+  font-size: 20px;
+}
+
+input, select, button {
+  margin-bottom: 10px;
+  padding: 8px;
+  width: 100%;
+  box-sizing: border-box;
+  font-size: 18px;
+}
+
+button {
+  background-color: #007BFF;
+  color: #fff;
+  border: none;
+  border-radius: 4px;
+  cursor: pointer;
+}
+
+button:hover {
+  background-color: #0056b3;
+}
+
+#result {
+  margin-top: 20px;
+  font-size: 1.2em;
+  color: #333;
+}
