Convert Oersteds to Milliamperes per metre
Convert Oersteds (Oe) to Milliamperes per metre (mA/m) instantly and accurately.
Conversion Formula
mA/m = Oe × 79577.47155
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.
About Milliamperes per metre
The milliampere per metre (mA/m) equals 10⁻³ A/m. Antenna near-field H-field measurements and EMC pre-compliance tests use mA/m; CISPR 14/16 and FCC Part 15 limit radiated field strength for consumer electronics in mA/m or equivalent dBµA/m at specified distances. 1 mA/m = 10⁻³ A/m = 10⁻³ Oe × (1000/4π).
Quick Reference Table
| Oersteds (Oe) | Milliamperes per metre (mA/m) |
|---|---|
| 1 Oe | 79577.5 mA/m |
| 2 Oe | 159155 mA/m |
| 5 Oe | 397887 mA/m |
| 10 Oe | 795775 mA/m |
| 25 Oe | 1989440 mA/m |
| 50 Oe | 3978870 mA/m |
| 100 Oe | 7957750 mA/m |