// Sayfalama var ise "SQL_CALC_FOUND_ROWS"
$query = $db->query('SELECT SQL_CALC_FOUND_ROWS * FROM tablo');
// Sayfalama var ise
$query2 = $db->query('SELECT FOUND_ROWS() AS total');

while ($row = $query->fetch_object()):
....
endwhile;

// Sayfalama var ise
echo "Toplam: " . $query2->fetch_object()->total; 

// Yok ise zaten
echo "Toplam: " . $query->num_rows;