Focused assessment

Body composition

Three ways to describe your body's size and shape: BMI, girth measurements and skinfold calipers. Only the calipers estimate body fat; BMI and girth describe size and shape.

  • 3 checks
  • About 18 minutes plus rests
  • Pause and resume any time
  • No account needed to start

Ready when you are

One check at a time. At the end you get:

  • A rating for each check, by the same method as its own page
  • Your stronger results and the areas to work on
  • Next steps for training, eating and retesting

The guided journey needs JavaScript. You can still do each check on its own page from the list below.

Your safety: stop if anything hurts, you feel dizzy or unusually short of breath. This is not a diagnosis, and there is no single health score.

What you need
  • Your current height and weight (a tape measure and scales if you want to re-measure)
  • A flexible tape measure
  • Skinfold calipers and, ideally, someone to help
Your safety

This doesn't check for injuries or medical conditions. Stop if anything hurts, you feel dizzy or unusually short of breath, and get qualified advice if you need it. Each check also has its own safety note.

Your privacy

Your answers stay in this browser for up to 30 days unless you remove them. Your details (date of birth, sex, height and weight) are also kept as cookies for 30 days, so the individual checks and eating plans can use them. Sign in to keep your report in your account.

How it works

A focused check of one area. Each check is rated by the same method as its own page, and you see every result on its own.

Not a diagnosis, and there is no single health score. Each rating compares one result with Sneaky's rating bands (some published, some Sneaky's own), which have limits.

About 18 minutes plus rests. You can do it in one go or a check at a time. Every check is kept in this browser as you go: come back to this page on the same device to continue.

The 3 checks in this assessment