In the analytical section of this paper the magnitudes of the polarization vectors (Pi) of lead zirconate titanate are shown as they vary with the angle of an applied uniaxial stress. This is done by applying a directional cosine matrix to the stress tensor σjk in Pi=dijkσjk. In addition the polarization in the direction of a rotating stress is derived from rotating the dijk tensor. Two‐dimensional as well as three‐dimensional isometric plots of the results are shown. The experimental section describes the preparation of disks poled uniformly at 90° to their thickness and the use of the Berlincourt d33 meter to measure d333 as a function of angle. Very good agreement with the calculated results was obtained. The effect of electrodes on the measurement of d33 and the use of a d31 parameter to permit a d15 determination are also demonstrated. The d333 measurements provided ad15 value with a resolution of ± 8%. Its average value was within 5% of d15 values derived with other techniques.