Body fat
18.6%
Home Body fat calculator
Body fat calculator
Change a tape measurement and the percentage follows.
Fat mass
34.4 lb · 15.6 kg
Lean mass
150.6 lb · 68.3 kg
Waist and hip must be larger than the neck.
- Essential2–5%
- Athlete6–13%
- Fitness14–17%
- Average18–24%
- Above25+%
Why this exists
In the US this tape test is the Navy circumference method. A 6-foot man with a 36 in waist and a 16 in neck lands at 18.6%, which the usual ACE bands call average. It is not the BMI page.
The type stays small so the figures remain inside the card. Numbers stay in this browser and nothing is sent to a server.
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01How to use it
Choose sex and units, then enter height, neck, waist, hip, and weight.
The men’s sample is 72 in, 16, 36, and 185 lb.
The women’s sample is 64 in, 13, 30, and 40.
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02What you get
The large figure is the body-fat percentage.
The next lines show fat mass and lean mass in lb and kg together.
The rows are the ranges often printed with the ACE chart.
EnteredMale 72 in
18.6% Male percent 34.4 lb Fat weight 31.7% Female percent 15.6 kg Fat in kg -
03Worth knowing
The formula expects inches. Choosing cm divides by 2.54 first.
Men subtract the neck from the waist. Women subtract the neck from waist plus hip.
The calorie page looks at intake. This page looks at the tape.
Questions
- QWhat is 18.6%?
- AThe result for 72 in, neck 16, waist 36.
- QWhat is 31.7%?
- AThe result for 64 in, neck 13, waist 30, hips 40.
- QWhat is 34.4 lb?
- A18.6% of 185 lb.
- QIs this BMI?
- ABMI uses only height and weight. This page uses neck and waist.
How this page works it out
This page uses the U.S. Navy circumference formula. A man who is 72 in tall, with a 16 in neck, a 36 in waist, and a weight of 185 lb, is 18.6% body fat.
Fat mass is 34.4 lb, or 15.6 kg, and lean mass is 150.6 lb, or 68.3 kg. The sample woman at 64 in, neck 13, waist 30, and hips 40 is 31.7%.
The formula expects inches. Centimetres are divided by 2.54. Unlike BMI, it uses the neck and the waist. The numbers stay in this browser.