Convert Amperes per foot to Gigaamperes per metre
Convert Amperes per foot (A/ft) to Gigaamperes per metre (GA/m) instantly and accurately.
Conversion Formula
GA/m = A/ft × 3.280839895e-9
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 Gigaamperes per metre
The gigaampere per metre (GA/m) equals 10⁹ A/m. Encountered only in extreme physics - neutron stars (magnetars) have surface fields of 10⁹-10¹¹ T, corresponding to GA/m to TA/m H-fields; plasma pinch experiments in z-pinch fusion drivers transiently achieve GA/m field strengths along the pinch axis. 1 GA/m = 10⁹ A/m.
Quick Reference Table
| Amperes per foot (A/ft) | Gigaamperes per metre (GA/m) |
|---|---|
| 1 A/ft | 3.281 × 10-9 GA/m |
| 2 A/ft | 6.562 × 10-9 GA/m |
| 5 A/ft | 1.64 × 10-8 GA/m |
| 10 A/ft | 3.281 × 10-8 GA/m |
| 25 A/ft | 8.202 × 10-8 GA/m |
| 50 A/ft | 1.64 × 10-7 GA/m |
| 100 A/ft | 3.281 × 10-7 GA/m |