Convert Amperes per foot to Amperes per metre
Convert Amperes per foot (A/ft) to Amperes per metre (A/m) instantly and accurately.
Conversion Formula
A/m = A/ft × 3.280839895
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 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 foot (A/ft) | Amperes per metre (A/m) |
|---|---|
| 1 A/ft | 3.28084 A/m |
| 2 A/ft | 6.56168 A/m |
| 5 A/ft | 16.4042 A/m |
| 10 A/ft | 32.8084 A/m |
| 25 A/ft | 82.021 A/m |
| 50 A/ft | 164.042 A/m |
| 100 A/ft | 328.084 A/m |