diff --git a/index.html b/index.html
index 95a2142..84fce44 100755
--- a/index.html
+++ b/index.html
@@ -2,6 +2,16 @@
     "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
 <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
 <head>
+	<!-- Begin Google Analytics for https://okepscor.github.io/watercalc/ -->
+	<!-- Global Site Tag (gtag.js) - Google Analytics -->
+	<script async src="https://www.googletagmanager.com/gtag/js?id=UA-107395419-1"></script>
+	<script>
+	  window.dataLayer = window.dataLayer || [];
+	  function gtag(){dataLayer.push(arguments)};
+	  gtag('js', new Date());
+	  gtag('config', 'UA-107395419-1');
+	</script>
+	<!-- End Google Analytics for https://okepscor.github.io/watercalc/ -->
 	<meta http-equiv="content-type" content="text/html; charset=utf-8" />
 	<meta http-equiv="content-script-type" content="text/javascript" />
 	<meta http-equiv="content-style-type" content="text/css" />
