Magnetomotive Force Converter — Ampere-Turns & Gilberts

Convert magnetomotive force between ampere-turns, kiloampere-turns, and gilberts.

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How this conversion works. MMF is converted through the ampere-turn; the gilbert uses the exact 10/4π relation given in NIST Special Publication 811.

How to use

  1. Pick the unit you are converting from, such as Kiloampere-turn (kAt) or Ampere-turn (At).
  2. Type the value and every other unit updates as you type.
  3. Copy the figure you need, or use the swap button to reverse the direction, Kilogilbert (kGb) included.

Frequently asked questions

How do I convert gilbert to ampere-turn?

1 gilbert = 0.795775 ampere-turn. Choose "Gilbert (Gb)" as From and "Ampere-turn (At)" as To, type a value, and the result updates instantly.

What is an ampere-turn?

The MMF of one ampere flowing through one coil turn. A 200-turn coil carrying 0.5 A produces 100 At — turns multiply the current’s magnetizing effect.

Why is the gilbert slightly smaller than the ampere-turn?

The CGS definition absorbs 4π: 1 Gb = 10/(4π) ≈ 0.79577 At. Old speaker and relay specs in gilberts convert with that exact ratio.

Is my data sent to a server?

No. Conversions run entirely in your browser using fixed factors — nothing is uploaded or logged.

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