Estimated Post Reading Time in Blogger posts

Here you will know how to display
 Estimated Post Reading Time in Blogger all posts to make
  Your visitors more comfortable to read your posts/Articles

Go To Blogger Dashboard and click on Edit HTML then Follow below instruction and paste the codes accordingly:

Find </head> and above it paste below code_

<script type='text/javascript'>//<![CDATA[
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    if (typeof(jQuery) == 'undefined') {
 //output the script (load it from google api)
 document.write("<scr" + "ipt type=\"text/javascript\" src=\"https://ajax.googleapis.com/ajax/libs/jquery/1.7.1/jquery.min.js\"></scr" + "ipt>");}
       //]]>
       </script> 

Find </body> and above it paste below code_

<script type='text/javascript'>
/*!
Name: Reading Time
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Dependencies: jQuery
Author: Michael Lynch
Author URL: http://michaelynch.com
Date Created: August 14, 2013
Date Updated: June 10, 2014
Licensed under the MIT license
*/
//<![CDATA[
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;(function(a){a.fn.readingTime=function(r){if(!this.length){return this}var h={readingTimeTarget:".eta",wordCountTarget:null,wordsPerMinute:270,round:true,lang:"en",lessThanAMinuteString:"",prependTimeString:"",prependWordString:"",remotePath:null,remoteTarget:null};var i=this;var c=a(this);i.settings=a.extend({},h,r);var e=i.settings.readingTimeTarget;var d=i.settings.wordCountTarget;var k=i.settings.wordsPerMinute;var p=i.settings.round;var b=i.settings.lang;var l=i.settings.lessThanAMinuteString;var o=i.settings.prependTimeString;var f=i.settings.prependWordString;var g=i.settings.remotePath;var n=i.settings.remoteTarget;if(b=="it"){var m=l||"Meno di un minuto";var q="mins"}else{if(b=="fr"){var m=l||"Moins d'une minute";var q="mins"}else{if(b=="de"){var m=l||"Weniger als eine Minute";var q="mins"}else{if(b=="es"){var m=l||"Menos de un minuto";var q="mins"}else{if(b=="nl"){var m=l||"Minder dan een minuut";var q="mins"}else{var m=l||"< 1 Min";var q="mins"}}}}}var j=function(y){var v=y.trim().split(/\s+/g).length;var u=k/60;var s=v/u;if(p===true){var x=Math.round(s/60)}else{var x=Math.floor(s/60)}var w=Math.round(s-x*60);if(p===true){if(x>0){a(e).text(o+x+" "+q)}else{a(e).text(o+m)}}else{var t=x+":"+w;a(e).text(o+t)}if(d!==""&&d!==undefined){a(d).text(f+v)}};c.each(function(){if(g!=null&&n!=null){a.get(g,function(s){j(a("<div>").html(s).find(n).text())})}else{j(c.text())}})}})(jQuery);
//]]>
</script>
<script type='text/javascript'>
$(function() {
$(&#39;.post-body&#39;).readingTime();
});
</script>

Find    <div class='post-header-line-1'> and below ite paste below code_

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<span id="etawrap" class='eta'/> 

Find ]]></b:skin> and above it pas below code_

#etawrap{font-weight:bold;color:#FF0000;}

You are all done , just save and see the changes.