Harpenden Skinfold Caliper
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Body Density Equations

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Harpenden Skinfold Caliper Body Assessment Software

LINEAR REGRESSION EQUATIONS (DURNIN & WORMERSLEY)
BODY DENSITY = C-[M(LOG10 SUM OF ALL FOUR SKINFOLDS)]

MALE 17-19 20-29 30-39 40-49 50
C 1.1620 1.1631 1.1422 1.1620 1.1715
M 0.0630 0.0632 0.0544 0.0700 0.0779

 

FEMALE 16-19 YRS 20-29 YRS 30-39 YRS 40-49 YRS 50 + YRS
C 1.1549 1.1599 1.1423 1.1333 1.1339
M 0.0678 0.0717 0.0632 0.0612 0.0645

THE SIRI EQUATION

BODY DENSITY EQUATIONS (JACKSON & POLLOCK)

MALE BD = 1.0990750 - 0.0008209 (X2) + 0.0000026 (X2)2 - 0.0002017 (X3) - 0.005675 (X4) + 0.018586 (X5)

Where

X2 = sum of the chest, abdomen and thigh skinfolds in mm

X3 = age in years

X4 = waist circumference in cm

X5 = forearm circumference in cm

FEMALE BD = 1. 1 470292 - 0.0009376 (X3) + 0.0000030 (X3)2 - 0.000 1 1 56 (X4) - 0.0005839 (X5)

Where

X3 = sum of triceps, thigh and suprailiac skinfolds, in mm

X4 = age in years

X5 = gluteal circumference, in cm

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