This function returns a reading time estimate based ont he number of words in an article
/**
* Count words in blog articles to estimate reading time
*/
function rs_estimate_reading_time()
{
global $post;
$readingContent = str_word_count(strip_tags(get_the_content()));
$wpm = 200;
$readingTime = round( $readingContent / $wpm );
if( $readingTime > 60 ) {
$readingTime = 'Over an Hour';
} else {
$readingTime .= ' minutes';
}
echo $readingTime;
}