ampere square meter
Magnetic momentexact by definition
The ampere square metre is the SI unit of magnetic dipole moment written in its current-loop form, exactly equal to the joule per tesla. A single turn of wire enclosing one square metre and carrying one ampere has a moment of one A·m². A small neodymium magnet is a few tenths of one, and the Earth's dipole moment is about 7.7e22. The equality is exact, the two forms being the same coherent SI unit.
| 1 | 1 |
One ampere square meter in every magnetic moment unit
| 1.97989e+26 | nuclear magneton (μ_N) | |
| 1.07828e+23 | Bohr magneton (μ_B) | |
| 1,000 | erg per gauss (erg/G) | |
| 1,000 | milliampere square meter (mA·m²) | |
| 1,000 | emu (magnetic moment) (emu) | |
| 1 | joule per tesla (J/T) | |
| 1 | ampere square meter (A·m²)this unit |