Body composition
Fat mass vs. fat-free mass
California's mobile hydrostatic testing lab
Know what changed. Not just what you weigh.
A 10-minute body composition test that separates fat from muscle and gives you useful targets for what to do next.
10 minPrivate test
$55First test
3 regionsLA · SD · Ventura
BFT / CASample report
Your body, separated
Fat mass + fat-free mass
See what a bathroom scale cannot show—and track the change at every future test.
Fat massFat-free mass
Body fat %
Lean mass
Calorie target
Test history
89–92°F warm waterUnder for about 5 secondsPrivate — just you and your testerCommercial-grade filtration
One test. Useful answers.
The scale gives you a number. We show you what it means.
Personal calorie target
Based on your measured body
Progress over time
Compare every visit
Report to keep
Clear numbers, in your hand
Stop tracking the wrong thing
Weight loss and fat loss are not the same.
Your bathroom scale combines everything into one number. Hydrostatic testing shows whether a change came from fat or from the muscle you worked hard to build.
Read the testing FAQIncluded in every report06 outputs
01
Body fat percentage
02
Fat and fat-free mass
03
Daily calorie target
04
Exercise calorie estimates
05
Age and gender comparison
06
Your previous test history
Simple by design
From booking to results in three clear steps.
No clinic maze. No waiting days for a report. The lab comes to a gym or business near you.
Find a truck
Choose a testing date near you from our Southern California event calendar.
Get in the tank
The private, warm-water test takes about 10 minutes from start to finish.
Leave with answers
Get your results immediately, plus a detailed report and practical targets.
Los Angeles · San Diego · Ventura
The lab comes to you
Accurate testing, without the clinical runaround.
Our mobile testing trucks visit gyms, studios, businesses, and community locations across Southern California. The tank is warm, private, and ready when you arrive.
Results immediately No radiation
View events and pricingMeet your tester
Every test is run and explained by Linda Finley.
Linda is the owner-operator behind Body Fat Test California — a hydrostatic weighing specialist and ISSA Sports Nutrition Performance Specialist who has been bringing the tank to Southern California gyms and communities since 2008. She walks you through your numbers one-on-one, in plain language.
Owner-operatorHydrostatic weighing specialistISSA Sports Nutrition Performance Specialist
Text Linda a question — (805) 205-5356★★★★★
“There is no substitute for the information she provides from the tests. I never would have found those eating and workout habits otherwise.”
Simon JohnsonVerified Google review · Client for 3 years
Read customer stories