Body Fat Percentage vs Scale Weight
Scale weight cannot show how much weight is fat mass versus lean mass. Body fat tracking gives more context for physique changes.
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Body Composition
Body Fat Calculator
The US Navy formula uses tape measurements to estimate body fat. It is accessible, repeatable, and useful for tracking trends over time.
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Your Body Fat Estimate
Estimated body fat is 17.5%, classified as Fitness.
Body Fat
17.5%
Category
Fitness
Estimated Lean Mass
64.3 kg
Estimated Fat Mass
13.7 kg
Result Breakdown
Lean Mass64.3 kg
Fat Mass13.7 kg
Repeat measurements under the same conditions and compare trends rather than treating one estimate as absolute.
Tracking Measurements
Measure at the same time of day, use the same tape tension, and compare multi-week trends instead of single readings.
Body Fat Calculator FAQ
What is the US Navy body fat formula?
It estimates body fat using height, neck, waist, and for women hip circumference. Measurements should be consistent each time.
Is tape-measure body fat accurate?
It is an estimate, not a lab test. It is most useful when repeated under the same conditions to track direction over time.
Where should I measure my waist?
Use a consistent tape position around the abdomen, keep the tape level, and do not compress the skin.