**mb**,

**Mb**, and

**MB**may stand for:

- Manitoba
- Mercedes Benz
- a manned base
- Bachelor of Medicine (academic degree)
- Medical Board
- megabit (
**Mb**)¹, or 1,048,576 (2^{20}) bits, or 1,000,000 bits - megabyte (
**MB**)¹, or 1,048,576 (2^{20}) bytes, or 1,000,000 bytes - millibar (
**mb**)¹, a unit of pressure equal to one hectopascal