7-Site Skinfold Calculator
Enter your measurements to estimate body fat percentage with the Jackson-Pollock 7-site method — the standard most certified trainers use.
Skinfold measurements (mm)
0 of 7Your result will appear here
Enter your age and all seven measurements to see your body fat estimate.
Measuring tips
- Pinch only skin and fat, never the muscle underneath.
- Measure on the right side of the body.
- Take each site 2–3 times and use the average.
- Hold the pinch while you read the calipers.
The 7 sites
The seven sites. Match each number to the list below.
Chest
Upper chest, beside the nipple line
Pinch a diagonal fold about 1 inch to the side of the nipple, halfway between the armpit and the nipple.
Midaxillary
Side of the ribcage, under the armpit
Pinch a vertical fold on the side of the ribcage, in line with the middle of the armpit, level with the bottom of the breastbone.
Triceps
Back of the upper arm
Pinch a vertical fold on the back of the arm, halfway between the shoulder and the elbow.
Subscapular
Upper back, below the shoulder blade
Pinch a diagonal fold about 1 inch below the bottom tip of the shoulder blade, at roughly a 45 degree angle.
Abdomen
Stomach, beside the navel
Pinch a vertical fold about 1 inch to the right of the belly button.
Suprailiac
Upper hip, above the hip bone
Pinch a diagonal fold just above the hip bone, following the natural slant of the pelvis.
Thigh
Front of the thigh
Pinch a vertical fold on the front of the thigh, halfway between the hip and the knee.
This is an estimate only. Caliper results vary from person to person, and a trained professional will always be more accurate. Not medical advice.