Convert Amperes per foot to Femtoamperes per metre
Convert Amperes per foot (A/ft) to Femtoamperes per metre (fA/m) instantly and accurately.
Conversion Formula
fA/m = A/ft × 3.280839895e+15
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 Femtoamperes per metre
The femtoampere per metre (fA/m) equals 10⁻¹⁵ A/m. Used in SQUID (superconducting quantum interference device) magnetometer research to characterise noise floors in ultra-sensitive magnetic field measurements; the Earth's geomagnetic DC drift and biomagnetic fields from neurons produce field gradients at the fA/m level in heavily shielded rooms. 1 fA/m = 10⁻¹⁵ A/m.
Quick Reference Table
| Amperes per foot (A/ft) | Femtoamperes per metre (fA/m) |
|---|---|
| 1 A/ft | 3.281 × 1015 fA/m |
| 2 A/ft | 6.562 × 1015 fA/m |
| 5 A/ft | 1.64 × 1016 fA/m |
| 10 A/ft | 3.281 × 1016 fA/m |
| 25 A/ft | 8.202 × 1016 fA/m |
| 50 A/ft | 1.64 × 1017 fA/m |
| 100 A/ft | 3.281 × 1017 fA/m |