Intrinsic carrier concentration in Hg1−xCdxTe is calculated as a function of temperature and composition using the Kane nonparabolic approximation for band structure and recent measurements of the heavy hole massmhand energy gapEg. An expression fitted to these calculations is:ni[5.585−3.820x+1.753(10−3)T−1.364(10−3)xT] ×(1014)E3/4gT3/2exp(−Eg/2kbT). The fit of this approximation is within 1% of the calculatednifor the rangeEg>0, 50<T<300 K andx<0.7. It is also within 15% of experimentalniobtained from Hall measurements.