BIT_LENGTH(str): Returns the length of the string str in bits : BIT_LENGTH « String Functions « MySQL Tutorial

1. MySQL Tutorial
2. String Functions
3. BIT_LENGTH

mysql>
mysql> SELECT BIT_LENGTH('text');
+--------------------+
| BIT_LENGTH('text') |
+--------------------+
|                 32 |
+--------------------+
1 row in set (0.00 sec)

mysql>