diff --git a/CHANGELOG.md b/CHANGELOG.md
index 1d6d6e6..643bd81 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,11 @@
 
 All notable changes to this project will be documented in this file.
 
+## 1.2.0 - 2018-06-18
+
+### Added
+- Calculate the read time of the whole entry based on it's field layout 
+
 ## 1.1.0 - 2018-06-06
 
 ### Changed
diff --git a/README.md b/README.md
index 67d5be6..50f1982 100644
--- a/README.md
+++ b/README.md
@@ -36,7 +36,7 @@ The average user read speed is set at 200 words per minute by default, this can
 
 ## Using the Filter
 
-The `|readTime` filter returns a human time duration of how long it takes the average user to read the provided content. The value provided can be a string or an array of values.
+The `|readTime` filter returns the human time duration of how long it takes the average user to read the provided content. The value provided can be a string or an array of values.
 
 Seconds are included by default, but can be disabled by using `|readTime(false)`
 
@@ -60,6 +60,26 @@ Returns: 2 minutes, 40 seconds
 Returns: 3 minutes
 ```
 
+## Using the Function
+
+The `readTime()` function returns the average read time for the whole entry based on it's field layout.
+
+Seconds are included by default, but can be disabled by adding a second parameter of `false`
+
+#### Examples
+
+```twig
+{{ readTime(entry) }}
+
+Returns: 9 minutes, 40 seconds
+```
+
+```twig
+{{ readTime(entry, false) }}
+
+Returns: 10 minutes
+```
+
 ## Overriding Plugin Settings
 
 If you create a [config file](https://docs.craftcms.com/v3/configuration.html) in your `config` folder called `read-time.php`, you can override the plugin’s settings in the Control Panel. Since that config file is fully [multi-environment](https://docs.craftcms.com/v3/configuration.html) aware, this is a handy way to have different settings across multiple environments.
@@ -78,6 +98,4 @@ return [
 
 Some things to do, and ideas for potential features:
 
-- Twig extension that calculates the read time for all of the fields that exist within a given entry `{{ readTime(entry) }}` for example
-
 Brought to you by [Luke Youell](https://github.com/lukeyouell)
diff --git a/composer.json b/composer.json
index b7efa1a..8d5dde8 100644
--- a/composer.json
+++ b/composer.json
@@ -2,7 +2,7 @@
     "name": "lukeyouell/craft-readtime",
     "description": "Calculate the estimated read time for content.",
     "type": "craft-plugin",
-    "version": "1.1.0",
+    "version": "1.2.0",
     "keywords": [
         "craft",
         "cms",
diff --git a/src/twigextensions/ReadTimeTwigExtension.php b/src/twigextensions/ReadTimeTwigExtension.php
index aba683e..f35872a 100644
--- a/src/twigextensions/ReadTimeTwigExtension.php
+++ b/src/twigextensions/ReadTimeTwigExtension.php
@@ -15,6 +15,8 @@
 use Craft;
 use craft\helpers\DateTimeHelper;
 
+use yii\base\ErrorException;
+
 class ReadTimeTwigExtension extends \Twig_Extension
 {
     // Public Methods
@@ -25,14 +27,46 @@ public function getName()
         return 'readTime';
     }
 
+    public function getFunctions()
+    {
+        return [
+            new \Twig_SimpleFunction('readTime', [$this, 'readTimeFunction']),
+        ];
+    }
+
     public function getFilters()
     {
         return [
-            new \Twig_SimpleFilter('readTime', [$this, 'readTime']),
+            new \Twig_SimpleFilter('readTime', [$this, 'readTimeFilter']),
         ];
     }
 
-    public function readTime($value = null, $showSeconds = true)
+    public function readTimeFunction($element, $showSeconds = true)
+    {
+        $settings = ReadTime::$plugin->getSettings();
+        $wpm = $settings->wordsPerMinute;
+        $totalSeconds = 0;
+
+        foreach ($element->getFieldLayout()->getFields() as $field) {
+            try {
+                $fieldVal = $element->getFieldValue($field->handle);
+
+                $value = is_array($fieldVal) ? implode(' ', $fieldVal) : (string)$fieldVal;
+                $words = str_word_count(strip_tags($value));
+                $seconds = floor($words / $wpm * 60);
+
+                $totalSeconds = $totalSeconds + $seconds;
+            } catch (ErrorException $e) {
+                continue;
+            }
+        }
+
+        $duration = DateTimeHelper::secondsToHumanTimeDuration($seconds, $showSeconds);
+
+        return $duration;
+    }
+
+    public function readTimeFilter($value = null, $showSeconds = true)
     {
         $settings = ReadTime::$plugin->getSettings();