Following the concept of transient heat condition and latent heat transport mechanisms to operate simultaneously to describe heat transfer rate during nucleate pool boiling of liquids, and the expressions of nucleation site density, bubble departure diameter and bubble emission frequency, a correlation for boiling of liquids under subatmospheric pressures has been developed. The correlation is free from the term accounting the effect of surface characteristics of the heating surface. The values of heat transfer rate predicted from correlation agree well with the experimentally-determined values for the boiling of various liquids from heating surfaces of differing characteristics employed in different investigations. The resulting correlation is capable to examine the consistency of experimental data of nucleate pool boiling of liquids under subatmospheric pressures.