Convert Amperes per inch to Amperes per metre
Convert Amperes per inch (A/in) to Amperes per metre (A/m) instantly and accurately.
Conversion Formula
A/m = A/in × 39.37007874
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 Amperes per metre
The ampere per metre (A/m) is the SI coherent unit of magnetic field strength H, expressing the magnetomotive force per unit length. It defines how strongly a field drives magnetic flux through a material. Earth's geomagnetic H field is approximately 40-60 A/m; a typical transformer core operates at 100-1000 A/m. 1 A/m = 1 A m⁻¹.
Quick Reference Table
| Amperes per inch (A/in) | Amperes per metre (A/m) |
|---|---|
| 1 A/in | 39.3701 A/m |
| 2 A/in | 78.7402 A/m |
| 5 A/in | 196.85 A/m |
| 10 A/in | 393.701 A/m |
| 25 A/in | 984.252 A/m |
| 50 A/in | 1968.5 A/m |
| 100 A/in | 3937.01 A/m |