Surface area of 201 Japanese from 0 to 70 years of age in both sexes was measured by Gampipaper method. Calculating the regression between the figure or logarithm of surface area and other body measurements (i.e. weight, height etc), it has been found significant difference on their regression between below and over 12 years of age.
Then we have fixed the new calculation formula of surface area of Japanese over 12 years of age as follows:
S=W^0.423×0.423^0.615×102.65
(S: Surface area in cm², W: Weight in Kg, H: Height in cm)
This formula have the least error both in mean and variance than Takahira's formula (S=W^0.425×H^0.725×72.46), which is most widely used in our country, and other formulas.