Installation

• Download the latest .py file. (The file without version number is the latest, use that. The files with version numbers are for the marked version of Blender)
• Open your Preferences menu and under the Add-ons tab click on the Install button.
• Navigate to the folder where your downloaded file is located. Select it and click on the Install Add-on button.

• If you have difficulties with downloading the add-on, try clicking with right mouse button and save the rendertime.py file to a desired folder. Or right-click and download. If your browser wants to show the .py file as text you can save it from there with save as. You can also try another browser. Or you can copy all the text into a text file and save that as rendertime.py.

• Enable the add-on by clicking on the checkbox next to the add-on name then close the Preferences window. 

Where can you find it?

Switch to the Rendering layout of Blender. You can find the main window of the add-on here, in the "N" panel of the Image Editor window. 

The add-on also shows the remaining time in the statusbar right before Blender's render information.

How does it work?

When you hit the Render animation button or press Ctrl+F12  the add-on starts with a rough estimation. The add-on re-calculates itself after each finished frame so the remaining time data can be more precise after a couple of rendered frames. 

Features

The upper part of the addon's main window contains the most important and relevant info. The remaining time of the rendering job. Under that you can also see the renderbar with the percentage of the readyness of the job. Below the renderbar you can find the Tip section. Here the add-on will give you advice to manage this time period. Sometimes you will find here useful Blender usage tips but sometimes just a silly comment.

In the next section below you can find statistics about your render. A lot of data and numbers in connection with this process such as the estimated finishing time or the average frame rendering time. Interesting isn't it?

You can watch this during the render or you can follow some of the hints the addon provides you. Or you can do something totally different. It's up to you. 

The last section contains the export possibility. You can specify a folder and a filename into which you can export the frames and their times (in seconds) by clicking on the Export Data button. By default, if you do not specify the folder, it will use the Output folder where your rendered frames are saved.