Volume compression of isotropic solids at high pressure may be determined by measurement of the inductance of a coil wound tightly around the sample. For isotropic compression of a coil, inductance is exactly proportional to the cube root of coil volume. Cores of tungsten, strontium titanate, cadmium sulfide, and sodium chloride were compressed to 55 kbar to test coil performance. The reproducibility of compression values varied from ±5 to ±15%. The observed compressions agree closely with other published results on compression and elastic constants. For nonconductive samples, no corrections need be applied to the volumetric data.