Estimated post reading time (App.php) for Sage 9

estimated_reading_time.php

/**
     * Estimated Reading Time
     *
     * Use by adding {{ App::estimated_reading_time(get_the_ID()) }} to the Blade view where you want to use it.
     *
     * @return void
     */
    public static function estimated_reading_time($post_id) {

        $the_content = apply_filters( 'the_content', get_the_content(null, false, $post_id));
        // count the number of words
        $words = str_word_count( strip_tags( $the_content ) );
        // rounding off and deviding per 200 words per minute
        $minute = floor( $words / 200 );
        // rounding off to get the seconds
        // $second = floor( $words % 200 / ( 200 / 60 ) );
        // calculate the amount of time needed to read
        $estimate = $minute . ' ' . __('min read','sage');
        // create output
        // return the estimate
        return $estimate;
    }