Total neutron cross sections for calcium and potassium have been measured using the transmission method. Monoenergetic neutrons were produced by the D(d,n)3He and T(d,n)4He reactions using the USANDL 750-keV Cockcroft-Walton accelerator. Measurements for each element were made at 7 neutron energies between 2.37 and 16 MeV. The measured total neutron cross sections range from 3.53 to 2.06 b for Ca and from 3.23 to 1.98 b for K.