Proton magnetic moment = 1.410 606 795 45 × 10−26 J·T⁻¹

Value
1.410 606 795 45 × 10−26
Unit
J·T⁻¹
Uncertainty
0.000 000 000 60 × 10⁻²⁶
Copy-ready
1.41060679545e-26

Magnetic dipole moment of the proton.

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
Proton magnetic moment to Bohr magneton ratio1.521 032 202 30 × 10−3(dimensionless)0.000 000 000 45 × 10⁻³
Proton magnetic moment to nuclear magneton ratio2.792 847 344 63(dimensionless)0.000 000 000 82
Proton-neutron magnetic moment ratio-1.459 898 02(dimensionless)0.000 000 34

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

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All physical constants

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