This disclosure provides methods and apparatus for wireless power field testing. An apparatus for sensing magnetic field strength of a wireless charging pad is provided. The apparatus includes a plurality of conductive loops each configured to sense a strength of a magnetic field passing through a respective one of the plurality of conductive loops. The apparatus includes at least one pair of terminals configured to be electrically connected to one or more of the plurality of conductive loops and configured to provide a voltage signal having a magnitude proportional to the strength of the magnetic field passing through the one or more of the plurality of conductive loops. In some implementations, the apparatus further includes a multiplexer circuit configured to individually electrically connect each of at least a subset of the plurality of conductive loops to the at least one pair of terminals.