Convert Oersteds to Femtoamperes per metre
Convert Oersteds (Oe) to Femtoamperes per metre (fA/m) instantly and accurately.
Conversion Formula
fA/m = Oe × 7.957747155e+16
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 Femtoamperes per metre
The femtoampere per metre (fA/m) equals 10⁻¹⁵ A/m. Used in SQUID (superconducting quantum interference device) magnetometer research to characterise noise floors in ultra-sensitive magnetic field measurements; the Earth's geomagnetic DC drift and biomagnetic fields from neurons produce field gradients at the fA/m level in heavily shielded rooms. 1 fA/m = 10⁻¹⁵ A/m.
Quick Reference Table
| Oersteds (Oe) | Femtoamperes per metre (fA/m) |
|---|---|
| 1 Oe | 7.958 × 1016 fA/m |
| 2 Oe | 1.592 × 1017 fA/m |
| 5 Oe | 3.979 × 1017 fA/m |
| 10 Oe | 7.958 × 1017 fA/m |
| 25 Oe | 1.989 × 1018 fA/m |
| 50 Oe | 3.979 × 1018 fA/m |
| 100 Oe | 7.958 × 1018 fA/m |