time-to-read-usage.php

<?php if( function_exists( 'pt_time_to_read' ) ) { echo pt_time_to_read( 'Time to read: ', ' Minutes' ); } ?>

time-to-read.php

/** Estimate the time to read the full post **/
function pt_time_to_read( $before = '', $after = '' ) {
    global $post;
 
    $count = pt_post_word_content();
    $time = $count / 60; // assume 60 words per minute
 
    return $before . round( $time ) . $after;
}

word-count.php

/** Get word count of a post **/
function pt_post_word_content() {
    global $post;
 
    //Variable: Additional characters which will be considered as a 'word'
    $char_list = ''; /** MODIFY IF YOU LIKE.  Add characters inside the single quotes. **/
    //$char_list = '0123456789'; /** If you want to count numbers as 'words' **/
    //$char_list = '&@'; /** If you want count certain symbols as 'words' **/
    return str_word_count(strip_tags($post->post_content), 0, $char_list);
}