Hydrostatic Body Fat Test

Hydrostatic body fat test is still the most accurate method that uses a natural process.

It's Just You And The Water

Our process is not only the most natural way to test your body fat and understand your body composition, but is also one of the most accurate ways to do so.

Why Measure Body Fat

Weight alone is not a clear indicator of good health because it does not distinguish between pounds that come from body fat and pounds that come from lean body mass or muscle.

What It Is

Hydrostatic Weighing is the most widely used test of body density and has always been the criterion measure for other indirect measures.


Hydrostatic weighing is an incredibly accurate technique for measuring body composition. The technique uses tried and true variables that feature a low percentage of error. For that reason, many experts refer to hydrostatic weighing as the gold standard for measuring body composition.

Diane Carr

Level 1 Crossfit Trainer, Martial Arts - 4th Degree Black Belt

“Your thoughts become your words, your words become your actions, and your actions dictate your destiny” - Ben Bergeron.

Diane holds an undergraduate degree from Austin Peay State University and an MBA from Murray State University. After over 20 years in accounting and finance, in 2018 she took a leap and started Bluegrass Body Fat Testing with the help of Chip and Lynn Sweatte at Southeast Body Fat Test.

Diane is a CrossFit CF-L1 trainer, and also is a 4th degree black belt and certified black collar instructor with the Choong Sil Kwan TaeKwonDo federation.

Hydrostatic Body Fat Test Video

Hydrostatic weighing, commonly referred to as underwater weighing, compares a subject’s normal bodyweight (outside the water) to his or her water displacement while completely submerged.


Natural Process


Most Accurate Results


Achieve True Body Density


No Harmful Radiation


Commonly Used In Research

Archimedes Principle

The buoyant force on a submerged object is equal to the weight of the fluid that is displaced by the object.

Body Fat Test Process

Our Hydrostatic water-based process is for everyone.


Initial Information

We will have an initial consultation where we take down your name, age, height, and dry weight before we begin the body fat test.


Step Into Tank

For this step you will need a bathing suit, a towel and be prepared to go completely under water.


Exhale & Submerge

You will exhale and completely submerge to be weighed….(You can wear a swim cap if you like).  This process is repeated at least two times to get the most accurate results. The water is chlorinated, filtered, and heated between 90 and 95 degrees Farenheit.


Get Results

You will be provided a four-page print out with an accurate measurement of your body fat percent and lean mass, a reference table showing where you are and where you should be, a calculation of your resting metabolic rate and a list of total calories you, specifically, will burn every 30 minutes of those exercises.


Accurately benchmark your fitness level in just 10 minutes. Use that information to reach those goals you've had for years.


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