Convert Oersteds to Amperes per foot
Convert Oersteds (Oe) to Amperes per foot (A/ft) instantly and accurately.
Conversion Formula
A/ft = Oe × 24.25521333
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 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.
Quick Reference Table
| Oersteds (Oe) | Amperes per foot (A/ft) |
|---|---|
| 1 Oe | 24.2552 A/ft |
| 2 Oe | 48.5104 A/ft |
| 5 Oe | 121.276 A/ft |
| 10 Oe | 242.552 A/ft |
| 25 Oe | 606.38 A/ft |
| 50 Oe | 1212.76 A/ft |
| 100 Oe | 2425.52 A/ft |