Show post count in wordpress instead of page count in wordpress pagination

/**
 * Display pagination information in the format "X - Y of Z".
 * 
 * @param object $wp_query Optionally generate string from custom query, defaults to main.
 */
function wpse_106121_posts_count( $wp_query = null ) {
    if ( ! $wp_query )
        global $wp_query;

    $posts = min( ( int ) $wp_query->get( 'posts_per_page' ), $wp_query->found_posts );
    $paged = max( ( int ) $wp_query->get( 'paged' ), 1 );
    $count = ( $paged - 1 ) * $posts;

    printf(
        '%d - %d of %d',
        $count + 1,
        $count + $wp_query->post_count,
        $wp_query->found_posts
    );
}

Place the above in your functions.php, then call it where you’d like to display the text:

<?php wpse_106121_posts_count() ?>