Convert Amperes per metre to Amperes per foot
Convert Amperes per metre (A/m) to Amperes per foot (A/ft) instantly and accurately.
Conversion Formula
A/ft = A/m × 0.3048
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.
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
| Amperes per metre (A/m) | Amperes per foot (A/ft) |
|---|---|
| 1 A/m | 0.3048 A/ft |
| 2 A/m | 0.6096 A/ft |
| 5 A/m | 1.524 A/ft |
| 10 A/m | 3.048 A/ft |
| 25 A/m | 7.62 A/ft |
| 50 A/m | 15.24 A/ft |
| 100 A/m | 30.48 A/ft |