The compound derived CGS unit, the maxwell, abbreviated as Mx, is the unit for the magnetic flux. The unit was previously called a line. The unit name honors James Clerk Maxwell, who presented the unified theory of electromagnetism.

1 maxwell = 1 gauss * cm² = 10⁻⁸ weber

In a magnetic field of strength one gauss, one maxwell is the total flux across a surface of one square centimetre perpendicular to the field.

Maxwell can also refer to:

• James Clerk Maxwell, 19th century Scottish physicist
• Robert Maxwell, politician and newspaper tycoon, and his controversial family
• The Maxwell automobile, an early 20th century brand of motor car
• Maxwell (musician) , a Nu soul artist
• Maxwell, Texas , a place in the United States of America