Navy Body Fat Calculator
Run Step 1 of the current U.S. Navy body-composition assessment using waist-to-height ratio, then see whether the official Step 2 lookup is required.
Enter or adjust the values above, then calculate.
Navy Body Fat: current Navy BCA Step 1 Screening
Run Step 1 of the current U.S. Navy body-composition assessment using waist-to-height ratio, then see whether the official Step 2 lookup is required.
Inputs this tool uses
- Sex used by the formula
- Height
- Weight — Used with sex and height-waist difference if the current Navy Step 2 lookup is required.
- Waist circumference — Measure at the current Navy Guide 4 waist location/procedure.
What you get
Passes the current Navy Step 1 waist-to-height screen.
How to use the Navy Body Fat Calculator
- Enter sex used by the formula, height, weight and the other fields relevant to this calculation.
- Select any method, activity level or option shown on this page, then choose Calculate.
- Read the main result together with the supporting values, method, assumptions and limitations below before using the estimate.
How this calculation works
Current Navy Guide 4 screening begins with waist-to-height ratio. The displayed ratio is rounded down to four decimal places for the Step 1 screen: 0.5499 or lower passes Step 1, while 0.5500 or higher requires the official sex-specific Step 2 lookup using height-waist difference and weight. This site does not approximate that policy table or relabel the retired neck/hip formula as current.
Example calculation
The sample values loaded into the calculator produce 0.4705. This example exists to show how the output is structured; replace the sample values with your own inputs for your calculation.
Assumptions and limitations
- This page calculates the current Navy Step 1 waist-to-height screen and prepares the height-waist difference used by Step 2; it does not approximate the official sex-specific Step 2 body-fat tables.
- Navy policy and lookup tables can change; confirm the linked current MyNavyHR Guide 4 for an official assessment.
Sources and review status
Source set last verified 2026-09-25. No clinician review is claimed unless a real named reviewer is displayed.
Questions people ask about Navy Body Fat Calculator
Does this use the current Navy body-composition process?
Yes for the current Step 1 waist-to-height screen. A ratio of 0.5499 or lower passes Step 1; 0.5500 or higher requires the official Step 2 body-fat lookup. This page does not substitute the retired neck/hip circumference equation for that current lookup.
Why does this page not show a body-fat percentage when Step 2 is required?
Current Navy Step 2 uses sex-specific official tables based on height-waist difference and weight. Rather than inventing or approximating those policy tables, the page tells you when Step 2 is required and shows the measurements needed to continue with the current official source.
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