${\overrightarrow{E}}_{\text{H}}=R_{\text{H}}\left(\overrightarrow{J}\times \overrightarrow{B}\right)$

${\overrightarrow{E}}_{\text{H}}$ is the resulting transverse electric field strength
$\overrightarrow{J}$ is the current density
$\overrightarrow{B}$ is the magnetic flux density

NOTE – The sign of the majority carrier charge can usually be inferred from the sign of the Hall coefficient.