Convert Amperes per inch to Oersteds
Convert Amperes per inch (A/in) to Oersteds (Oe) instantly and accurately.
Conversion Formula
Oe = A/in × 0.4947390006
About Amperes per inch
The ampere per inch (A/in) equals 1/0.0254 A/m ≈ 39.370 A/m. Standard unit in US magnetic core and inductor datasheets from manufacturers like Magnetics Inc. and Ferroxcube; B-H curves and core loss specifications for powder cores and ferrites are commonly plotted in Oe (H-axis) or A/in in North American catalogs. 1 A/in = 1/0.0254 A/m ≈ 39.37 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 inch (A/in) | Oersteds (Oe) |
|---|---|
| 1 A/in | 0.494739 Oe |
| 2 A/in | 0.989478 Oe |
| 5 A/in | 2.4737 Oe |
| 10 A/in | 4.94739 Oe |
| 25 A/in | 12.3685 Oe |
| 50 A/in | 24.737 Oe |
| 100 A/in | 49.4739 Oe |