BMI calculator
Calculate body mass index, see the WHO category and the healthy weight range for a given height.
Open toolSlaughter skinfold calculator (children and teens)
For clients aged 8 to 18. Enter sex, age, weight and the triceps and medial calf skinfolds to estimate body fat percentage.
years
lb
To calculate fat and lean massSkinfolds
mm
mm
Body fat
15.7%
Sum of skinfolds: 20 mm
Fat mass
18.1 lb
Lean mass
96.9 lb
For ages 8 to 18. Always use the same protocol and assessor to compare assessments.
How it works
- Sites: triceps and medial calf.
- Boys: % body fat = 0.735 × (triceps + calf) + 1.0.
- Girls: % body fat = 0.610 × (triceps + calf) + 5.1 (Slaughter et al., 1988).
FAQ
Why not use Jackson-Pollock with teens?
Adult equations don't account for the changes in body composition during childhood and adolescence. The Slaughter protocol was developed for this age group.
What care should I take when assessing minors?
Get permission from a parent or guardian, explain the procedure and, if possible, do the assessment with a guardian present.
In Trainer Fácil, every assessment is saved to the client's profile so you can compare progress month by month.
More tools
Jackson-Pollock skinfold calculator (3, 4 and 7 sites)
Calculate body fat percentage from skinfolds with the Jackson & Pollock 3, 4 and 7-site protocols.
Open toolPetroski skinfold calculator (4 sites)
Body fat percentage from Petroski's 4 skinfold sites, an equation developed with Brazilian adults.
Open tool