Neutron magnetic moment = -9.662 3653 × 10−27 J·T⁻¹

Value
-9.662 3653 × 10−27
Unit
J·T⁻¹
Uncertainty
0.000 0023 × 10⁻²⁷
Copy-ready
-9.6623653e-27

Magnetic dipole moment of the neutron.

Sets how strongly the particle lines up in a magnetic field — the quantity behind NMR, MRI and precision spectroscopy. A negative sign means the moment points opposite to the spin. Its ratios to the Bohr and nuclear magnetons and to other particles' moments are listed beneath.

The same quantity, other ways NIST lists it

Quantity (NIST name)ValueUnitUncertainty
Neutron-electron magnetic moment ratio1.040 668 84 × 10−3(dimensionless)0.000 000 24 × 10⁻³
Neutron magnetic moment to Bohr magneton ratio-1.041 875 65 × 10−3(dimensionless)0.000 000 25 × 10⁻³
Neutron magnetic moment to nuclear magneton ratio-1.913 042 76(dimensionless)0.000 000 45
Neutron-proton magnetic moment ratio-0.684 979 35(dimensionless)0.000 000 16
Neutron to shielded proton magnetic moment ratio-0.684 996 94(dimensionless)0.000 000 16

NIST, Fundamental Physical Constants — Complete Listing (2022 CODATA adjustment), retrieved 2026-07-26.

Magnetic moments, g-factors and gyromagnetic ratios

Deuteron magnetic momentElectron magnetic momentElectron g factorElectron gyromagnetic ratioElectron magnetic moment anomalyHelion g factorHelion magnetic momentHelion shielding shiftMuon g factorMuon magnetic momentMuon magnetic moment anomalyNeutron magnetic momentNeutron g factorNeutron gyromagnetic ratioProton g factorProton gyromagnetic ratioProton magnetic momentProton magnetic shielding correctionShielded helion gyromagnetic ratioShielded helion magnetic momentShielded proton gyromagnetic ratioShielded proton magnetic momentShielding difference of d and p in HDShielding difference of t and p in HTTriton g factorTriton magnetic moment

Link to or cite this value

Link from a web page

Plain HTML for any page that accepts markup.

<a href="https://usephysics.com/reference/neutron-magnetic-moment">Neutron magnetic moment — -9.662 3653 × 10−27 J·T⁻¹ — UsePhysics</a>

Link from Markdown

For READMEs, wikis and notes.

[Neutron magnetic moment — -9.662 3653 × 10−27 J·T⁻¹ — UsePhysics](https://usephysics.com/reference/neutron-magnetic-moment)

Cite it in a document

Replace [date] with the day you consulted the page. The line credits NIST/CODATA for the values.

UsePhysics. "Neutron magnetic moment — -9.662 3653 × 10−27 J·T⁻¹." UsePhysics.com. https://usephysics.com/reference/neutron-magnetic-moment. Value from the 2022 CODATA adjustment (NIST). Accessed [date].

All physical constants

Constants and formula sheetMagnetic moments, g-factors and gyromagnetic ratiosAll calculators