Estimate body fat percentage using the method that fits your needs. Choose a general body fat calculator, the Navy body fat method, or the current Army body composition assessment.
Which body fat calculator do you need?
Select one option below. Only the calculator you choose will appear, keeping the page focused on your specific measurement method.
Body Fat Calculator
Estimate body fat percentage from your basic body measurements. This is a general estimate and is not a clinical body-composition measurement.
This result is an estimate. Body-fat percentage can differ from the calculated value because measurement methods and individual body composition vary.
Army Body Fat Calculator
Calculate Waist-to-Height Ratio using the current U.S. Army body composition screening method.
Body Fat Percentage vs Body Composition
Body fat percentage estimates how much of your total body weight consists of fat. Different calculators use different measurements and equations, so results from two methods can differ for the same person.
General body fat estimate
Useful when you want a simple estimate based on basic body measurements without following a military assessment procedure.
Navy method
Uses circumference measurements and a military body-composition equation. Measurement technique matters when using this method.
Army method
The current Army screening method uses Waist-to-Height Ratio rather than the former circumference-based body-fat tape test.
How to choose the right calculator
Choose the Body Fat Calculator when you want a general estimate from basic body measurements. Choose the Navy Body Fat Calculator when you specifically need the Navy circumference method. Choose the Army Body Fat Calculator when you need to check the current Army Waist-to-Height Ratio screening calculation.
Military body-composition procedures are specific to their respective organizations. A general body-fat estimate should not be treated as an official military assessment.
Frequently Asked Questions
What is a body fat calculator?
A body fat calculator estimates the percentage of your body weight made up of fat. Different calculators use different measurements and mathematical equations, so results can vary between methods.
What is the Navy Body Fat Calculator?
The Navy method estimates body fat using body circumference measurements. The required measurements differ between men and women.
Does the Army still use the old body fat tape test?
No. The U.S. Army changed its body composition assessment in 2026. The current Army method uses Waist-to-Height Ratio, with waist measured at the navel and divided by height. The current benchmark is a ratio below 0.55. 2
What is the Army Waist-to-Height Ratio?
Divide waist circumference measured at the navel by height, using the same unit for both measurements. The Army currently uses a WHtR below 0.55 as its screening benchmark. 3
Why are Navy and general body fat results different?
Different methods use different measurements and equations. A general estimate and a circumference-based military estimate should not be expected to produce identical results.
Is body fat percentage the same as BMI?
No. BMI uses height and weight to produce a weight-to-height index. Body fat percentage estimates the proportion of body weight made up of fat. BMI does not directly measure body fat.
Are these calculators medically accurate?
These tools provide estimates. They do not replace clinical body-composition testing or professional assessment.
