Convert Amperes per foot to Oersteds
Convert Amperes per foot (A/ft) to Oersteds (Oe) instantly and accurately.
Conversion Formula
Oe = A/ft × 0.04122825005
About Amperes per foot
The ampere per foot (A/ft) equals 1/0.3048 A/m ≈ 3.281 A/m. Used in US electromagnetic coil design and transformer winding specifications where dimensions are in feet; older US Navy and DoD magnetic shielding specifications for shipboard demagnetisation state H values in A/ft. 1 A/ft = 1/0.3048 A/m ≈ 3.2808 A/m.
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 foot (A/ft) | Oersteds (Oe) |
|---|---|
| 1 A/ft | 0.0412283 Oe |
| 2 A/ft | 0.0824565 Oe |
| 5 A/ft | 0.206141 Oe |
| 10 A/ft | 0.412283 Oe |
| 25 A/ft | 1.03071 Oe |
| 50 A/ft | 2.06141 Oe |
| 100 A/ft | 4.12283 Oe |