Skinfold Body Fat Calculator: Jackson-Pollock 3-Site and 7-Site

Your details

Sex determines which measurement sites and which equation are used.
Age in years. The Jackson-Pollock equations are validated for ages 18-61.
years
The 3-site protocol needs fewer measurements; the 7-site protocol captures fat distribution across more body regions.
Skinfold measurements are always in millimetres regardless of the weight unit chosen.
Measure in the morning, before eating, without shoes or heavy clothing.
kg
Diagonal fold halfway between the anterior axillary line and the nipple.
mm
Vertical fold 2 cm to the right of the navel.
mm
Vertical fold at the midpoint of the anterior thigh, between the inguinal fold and the top of the patella.
mm
Body fatFitness (men)
14.2%

Estimated body fat percentage via Jackson-Pollock + Siri equations

Fat mass11.4kg
Lean mass68.6kg
Body density1.0663g/mL
Skinfold sum47mm
14.2 %
Essential<6Athletes6-14Fitness14-18Average18-25Obese25+

Your body fat is 14.2% - Fitness range for men.

  • Of your total weight, about 11.4 kg is fat and 68.6 kg is lean tissue.
  • Your body fat falls in the athlete-to-fitness range (6-17% for men), which is associated with good cardiometabolic health.
  • Skinfold equations have a typical measurement error of about plus or minus 3-4 percentage points even with correct technique, so track trends over time rather than reading too much into a single number.

Next stepFor a more complete picture, try the 7-site protocol or add a waist circumference measurement to assess visceral fat risk separately.

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