Node read time

Node read time is a module that provides an extra field for content types, which displays to the users the time it will take for them to read a node. This field takes into consideration all the textfields part of the content type, plus entity reference revision fields like Paragraphs, Custom blocks etc. It also comes with a configuration page, where you can: - activate the reading time field for specific content types; - set the "words per minute" value, which is part of the calculation of the reading time; - choose between minutes or minutes and seconds calculation/representation;

Also, the module provides twig template, which can be easily modified in your custom theme.

Update: From 1.4 version the module provides a field for Views.

Check how to install the module