Body fat
Body Fat Calculator
Estimate body fat % with a tape measure using the US Navy method.
Free tool · Body fat
Waist-to-height ratio calculator
The rule is easy to remember: keep your waist under half your height. It tracks belly fat directly, so it works for muscular people where BMI doesn't.
Results
- Waist-to-height ratio
- 0.49
- Under 0.5: the commonly used healthy cutoff.
- Waist for a 0.5 ratio
- 35.0 in
Estimates for general fitness use, not medical advice.
How to use it
- Measure your waist at the navel after a normal breath out.
- Enter waist and height in inches.
- Aim for under 0.5 and re-check monthly.
Read next
FAQ
What's a good waist-to-height ratio?
Under 0.5 is the commonly used healthy cutoff. People with visible abs are usually well under it.
Where exactly do I measure my waist?
Pick one spot, usually the navel, and always measure there, relaxed, at the same time of day.
More free tools
Body fat
Body Fat for Abs Calculator
See the body fat % and weight where your abs should start to show.
Body fat
Lean Body Mass Calculator
Work out how much of your weight is muscle, bone and water.
Body fat
FFMI Calculator
Fat-free mass index: how muscular you are for your height.