Crack opening displacements were evaluated on semi-elliptical indentation cracks in lead-free (1-x)(Na1/2Bi1/2)TiO3-xBaTiO(3) piezoceramics and a commercially available PZT ceramic. The observed crack-tip toughness of NBT-xBT was found to be substantially higher than for PZT. Two evaluations for the crack opening displacement were demonstrated and contrasted: A more elaborate three-term-approximation and a pragmatic utilization of the Irwin parabola.