This paper contains charts and tables so arranged as to facilitate considerably the otherwise laborious calculation of basal metabolism values. They are in such form as to be useful in calculating basal metabolic rate from data obtained with any form of apparatus. They are intended primarily for use in connection with determinations made by some method involving the use of a Haldane gas analysis apparatus. Such methods in common use are either that described by Boothby and Sandiford1 in which the expired air is collected in a large spirometer, or the method of Douglas2 in which a rubber bag is used for this purpose and the volume of its contents measured with a meter.3 In either of these methods the gasometric data include figures for volume, temperature, pressure, and carbon dioxid and oxygen content of the expired air. From these are to be computed the respiratory quotient and oxygen consumption