Technical Abstract: A method developed earlier to estimate the moisture content in single kernels of field corn from radio-frequency (RF) measurements was found to be applicable to single kernels of popcorn and peanuts also. Capacitance, phase angle and dissipation factor were measured with an impedance analyzer at 1 and 5 MHz on a parallel-plate capacitor holding the kernel between the plates. These values were used in a semi- empirical equation and the moisture contents were predicted successfully within 1% of their air-oven values for over 90% of the samples tested in each case. The moisture contents of the corn samples tested were in the range from 9 to 26%, the popcorn samples from 11 to 25% and the peanut kernels from 5 to 15%. The method is rapid and nondestructive.