Magnetic Field Strength Converter — A/m & Oersted

Convert magnetizing field strength between amperes per meter, kiloamperes per meter, and oersteds.

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How this conversion works. Field strength is converted through A/m; the oersted uses the exact 1000/4π relation given in NIST Special Publication 811.

How to use

  1. Choose the units to convert from and to.
  2. Enter a value — the converted result updates instantly.
  3. Click Copy to copy the result to your clipboard.

Frequently asked questions

How do I convert oersted to ampere per meter?

1 oersted = 79.5775 ampere per meter. Choose "Oersted (Oe)" as From and "Ampere per meter (A/m)" as To, type a value, and the result updates instantly.

Why is the oersted factor 1000/4π?

CGS electromagnetic units absorb a 4π into the field definitions. Converting to SI reintroduces it: 1 Oe = 1000/(4π) ≈ 79.577 A/m.

Where is field strength used instead of flux density?

Magnet coercivity (Hc) and coil magnetizing fields are quoted in Oe or kA/m. Inside a material, B = µ₀(H + M) — H is what your coil applies, B is what results.

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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