Convert Amperes per metre to Oersteds
Convert Amperes per metre (A/m) to Oersteds (Oe) instantly and accurately.
Conversion Formula
Oe = A/m × 0.01256637061
About Amperes per metre
The ampere per metre (A/m) is the SI coherent unit of magnetic field strength H, expressing the magnetomotive force per unit length. It defines how strongly a field drives magnetic flux through a material. Earth's geomagnetic H field is approximately 40-60 A/m; a typical transformer core operates at 100-1000 A/m. 1 A/m = 1 A m⁻¹.
About Oersteds
The oersted (Oe) equals exactly 1000/(4π) A/m ≈ 79.577 A/m, the CGS unit of magnetic field strength named after Hans Christian Ørsted. Still widely used in permanent magnet characterisation (NdFeB, SmCo, AlNiCo), magnetic recording, and older MRI literature. Earth's surface field is ≈ 0.5 Oe; a typical speaker magnet ≈ 5000 Oe. 1 Oe = 1000/(4π) A/m.
Quick Reference Table
| Amperes per metre (A/m) | Oersteds (Oe) |
|---|---|
| 1 A/m | 0.0125664 Oe |
| 2 A/m | 0.0251327 Oe |
| 5 A/m | 0.0628319 Oe |
| 10 A/m | 0.125664 Oe |
| 25 A/m | 0.314159 Oe |
| 50 A/m | 0.628319 Oe |
| 100 A/m | 1.25664 Oe |