TL;DR: Reading Timer for WordPress
In a perfect world, our visitors would have all the time in the world to read every word we write. In reality, your readers are more likely to take a pass on your longer posts or save them for later. TL;DR is a handy plugin that lets your readers know how much time they would have to spend to read your posts.
TL;DR is pretty easy to use. Simply select the average reading speed and image staring time in the back-end, and the rest is easy. Unlike other reading timers, this plugin takes into account images and videos you have shared on your site. Once it is set up, it displays the # of minutes it takes to read each post.