Magnetomotive Force Converter

About This Tool

This Magnetomotive Force (MMF) Converter is a specialized tool for electrical engineering and physics, especially in the design of electromagnets and transformers. It converts units of magnetomotive force, which is the property that drives magnetic flux in a magnetic circuit. The base unit is the ampere-turn (At).

MMF is the magnetic analogue of electromotive force (voltage) in an electric circuit. It is proportional to both the electric current flowing through a coil and the number of turns in that coil.

Tips & Features

• Ampere-turn (At): The ampere-turn is the SI unit for MMF. It is simply the product of the current in amperes and the number of turns in a coil (MMF = N × I).
• Gilbert (Gi): The gilbert is the corresponding unit of MMF in the CGS system. It is an older unit but may still be found in some contexts.
• Magnetic Circuits: MMF is a key concept in Ohm's law for magnetic circuits, which states that the magnetic flux (Φ) is equal to the MMF divided by the magnetic reluctance (reluctance is the magnetic equivalent of resistance).