Convert Oersteds to Gigaamperes per metre
Convert Oersteds (Oe) to Gigaamperes per metre (GA/m) instantly and accurately.
Conversion Formula
GA/m = Oe × 7.957747155e-8
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 Gigaamperes per metre
The gigaampere per metre (GA/m) equals 10⁹ A/m. Encountered only in extreme physics - neutron stars (magnetars) have surface fields of 10⁹-10¹¹ T, corresponding to GA/m to TA/m H-fields; plasma pinch experiments in z-pinch fusion drivers transiently achieve GA/m field strengths along the pinch axis. 1 GA/m = 10⁹ A/m.
Quick Reference Table
| Oersteds (Oe) | Gigaamperes per metre (GA/m) |
|---|---|
| 1 Oe | 7.958 × 10-8 GA/m |
| 2 Oe | 1.592 × 10-7 GA/m |
| 5 Oe | 3.979 × 10-7 GA/m |
| 10 Oe | 7.958 × 10-7 GA/m |
| 25 Oe | 1.989 × 10-6 GA/m |
| 50 Oe | 3.979 × 10-6 GA/m |
| 100 Oe | 7.958 × 10-6 GA/m |