Fitness Calculators

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Body Fat (YMCA) Calculator

How much of my weight is fat (using the YMCA formula)?

This calculator uses the formula developed by the YMCA to estimate your body fat percentage without calipers. Use a tape measure and enter your waist measurement. Combine the waist measurement with your gender and weight and this calculator will estimate your percent of body fat, how much of your weight is lean mass and how much is fat mass, and your general fitness category. The water displacement test is the most accurate way to determine body fat percent, but the Navy Body Fat test or YMCA formula is accurate within 1-3% for most people.

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Matt   You're basing obesity from your BMI measurement? How do you think bodybuilders factor in with such a measurement? - 12/13/2013 9:33:25 AM

Anonymous   I got -5lbs of fat - 9/16/2013 11:36:15 PM

MaryLamb   Awful calculator. I have a very small waist with full hips and large thighs. 14%?!? No way my body fat is that low! More like 23%! - 8/23/2013 9:01:15 AM

nuttaya junhasavasdikul   I am slim with 168 cm height. - 8/6/2013 2:01:34 AM

Isa   I am very obese (BMI over 30) and this calculator tells me my bodyfat is 24% en I am 'fit'. Really? This is bullshit. - 8/2/2013 12:12:15 AM

anonymous   AGE NEEDED! I play sports for my school and I work out 6 days a week. I eat somewhat over boundaries, mostly protein, and it says im underweight which is the "Essential Fat." They should explain having some muscles part. - 1/5/2013 1:48:55 PM

Puppet   I think they should include age cause it says I'm dangerously underweight but I'm pretty average for being 5 feet 6 inches and 110 pounds - 12/17/2012 10:59:13 PM

dancer   I think they should include age in the ymca formula because it is very inaccurate without it. The formula told me I was obese when I am really completely the opposite. - 8/21/2012 9:27:13 AM

Red   This is a great estimating tool. However, add 2-5% to this when doing actual skin fold measurements. - 12/8/2011 12:58:27 PM


Field Help

Input Fields

TitleA title for these calculator results that will help you identify it if you have printed out several versions of the calculator.

US/MetricChoose US or Metric units.

GenderSelect your gender.

WeightYour current scale weight.

Waist (at navel)Your waist measurement at the navel (or belly button).

Output Fields

Body FatThe approximate percentage of your body's mass that is made up of fat.

Fat MassThe portion of your weight that is fat.

Lean MassThe portion of your weight that is lean (not fat).

Body Fat CategoryYour body fat category depends on your gender and your body fat percentage.

Body Fat Categories TableThis table shows you the Body Fat Range for each Classification so you can see how close your calculated Body Fat percentage is to the next Body Fat Classification range.

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