Nuclear magneton

<math>\mu_p = {{e \hbar} \over {2 m_p}}</math>

<math>e</math> is the elementary charge,

<math>\hbar</math> is the Dirac's constant,

<math>m_p</math> is the proton rest mass

In the SI system of units it's value is approximately:

<math>\mu_p</math> = 5.050 786 6(17) × 10^-24 J·T^-1

See also proton magnetic moment[?].