A knowledge of pure tone loudness relations is of fundamental interest to all workers in the field of human hearing. Of these relations the pure tone equal‐loudness contours, three sets of which have been independently established, are probably the best known. These three sets of contours have the same general shape but show considerable deviations over parts of the auditory diagram.Making use of the results obtained by different workers and assuming a recently established loudness‐stimulus relation to hold at all frequencies in the audio range, a new set of equal loudness contours has been calculated. A set of curves giving the loudness of equal stimulus contours has also been calculated.