Convert Amperes per inch to Milliamperes per metre
Convert Amperes per inch (A/in) to Milliamperes per metre (mA/m) instantly and accurately.
Conversion Formula
mA/m = A/in × 39370.07874
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 Milliamperes per metre
The milliampere per metre (mA/m) equals 10⁻³ A/m. Antenna near-field H-field measurements and EMC pre-compliance tests use mA/m; CISPR 14/16 and FCC Part 15 limit radiated field strength for consumer electronics in mA/m or equivalent dBµA/m at specified distances. 1 mA/m = 10⁻³ A/m = 10⁻³ Oe × (1000/4π).
Quick Reference Table
| Amperes per inch (A/in) | Milliamperes per metre (mA/m) |
|---|---|
| 1 A/in | 39370.1 mA/m |
| 2 A/in | 78740.2 mA/m |
| 5 A/in | 196850 mA/m |
| 10 A/in | 393701 mA/m |
| 25 A/in | 984252 mA/m |
| 50 A/in | 1968500 mA/m |
| 100 A/in | 3937010 mA/m |