# Body Fat Percentage Calculator (Navy, Skinfold, Visual)

> Calculate body fat percentage with Navy tape, skinfolds, or a visual estimate, then use it to guide a cut, bulk, or recomposition plan.

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Body composition · Step 1

Estimate body fat, understand the range and use it alongside training experience to choose your next step.

## Use body-fat estimates as one part of the picture

Recomposition means losing fat and gaining muscle over the same period. Weight may fall, stay similar or rise, depending on the balance of those changes. Track waist, body measurements and training performance alongside the weight trend; none is conclusive on its own.

BMI tracks weight relative to height, not fat and muscle separately. During recomposition, BMI may fall, stay similar or rise. Even when it changes, it cannot tell you which tissue changed. Compare it with body measurements and training progress.

A falling body-fat percentage can reflect changes in fat, lean mass or both. It does not establish muscle gain on its own. Compare estimates made with the same method and conditions alongside weight, waist and training progress.

## What your body fat % implies for the recomposition protocol

ACE sex-specific bands paired with the two inputs that scale with body fat %: realistic fat-loss pace (during a cut) and protein target. Body recomposition is not one path; this is the deficit-and-lifting version. Sources below.

Band

Men

Women

Cut pace · % BW / wk

Protein · g/kg BW

Essential

Men

2–5%

Women

10–13%

Cut pace

not advised

Protein

n/a

Below the physiological floor. Sustained energy deficits at this level trigger RED-S: hormonal, immune, and bone consequences.

Athlete

Men

6–13%

Women

14–20%

Cut pace

≤ 0.5%

Protein

2.0–2.8

Visible muscularity. Protein needs climb because lean mass is harder to defend the leaner you go.

Fitness

Men

14–17%

Women

21–24%

Cut pace

0.5–0.7%

Protein

1.8–2.4

Recomposition keeps working through small deficits or maintenance.

Average

Men

18–24%

Women

25–31%

Cut pace

0.7–1.0%

Protein

1.6–2.2

The largest weekly weight change is tolerated here without disproportionate lean loss.

Above average

Men

≥ 25%

Women

≥ 32%

Cut pace

1.0–1.5%

Protein

1.6–2.0

Cardiometabolic load climbs from here. Aggressive deficits are best tolerated at this band.

Sources: [Helms 2014](https://jissn.biomedcentral.com/articles/10.1186/1550-2783-11-20) (protein during deficit, scaled by leanness) · [Garthe 2011](https://pubmed.ncbi.nlm.nih.gov/21558571/) (fast vs slow cuts on lean retention) · [Longland 2016](https://pubmed.ncbi.nlm.nih.gov/26817506/) (high protein + deficit + lifting drives recomposition) · [Mountjoy 2014](https://pubmed.ncbi.nlm.nih.gov/24620037/) (RED-S risk below the essential floor) · [Barakat 2020](https://pubmed.ncbi.nlm.nih.gov/32841221/) (recomposition is also possible at maintenance or in a small surplus for novices and detrained lifters).

## Picking a method you can repeat

Tape measurements, skinfolds and visual comparisons estimate body fat with different sources of error. Use a method you can repeat under similar conditions. Small changes may reflect measurement error; use the trend alongside other progress signals.

A falling body-fat percentage can reflect changes in fat, lean mass or both. It does not establish muscle gain on its own. Compare estimates made with the same method and conditions alongside weight, waist and training progress.

## Body recomposition, asked and answered

Six questions people search when their body fat % stops moving.

### Is body recomposition possible at my body fat %?

Possibly. Body-fat percentage alone cannot tell whether you will lose fat and gain muscle together. Resistance training, adequate protein and suitable intake matter, and responses vary. Compare weight, waist and training trends over several weeks.

### Why use body fat % instead of BMI for body recomposition?

BMI tracks weight relative to height, not fat and muscle separately. During recomposition, BMI may fall, stay similar or rise. Even when it changes, it cannot tell you which tissue changed. Compare it with body measurements and training progress.

### How long does body recomposition take from this body fat %?

When a next band is shown, the result models months to it at three assumed paces. These are illustrative estimates, not expected dates. Changes depend on intake, training, recovery and measurement error; compare weight and waist trends with repeated body-fat estimates over several weeks.

### Which method should I retest with for body recomposition?

Tape measurements, skinfolds and visual comparisons estimate body fat with different sources of error. Use a method you can repeat under similar conditions. Small changes may reflect measurement error; use the trend alongside other progress signals.

### What body fat % should I be at before starting body recomposition?

There is no required body-fat percentage before starting. Choose intake from your current priority: a modest deficit may fit fat loss, while maintenance may better support training or muscle gain. Review your response instead of waiting for a cutoff.

### How do I know body recomposition is actually working?

Recomposition means losing fat and gaining muscle over the same period. Weight may fall, stay similar or rise, depending on the balance of those changes. Track waist, body measurements and training performance alongside the weight trend; none is conclusive on its own.

Recompose with Recomp AI

## Use body-fat estimates as one part of the picture

Recomp AI brings your food log, weight trend and body measurements together. Review them alongside your training progress to decide whether your calorie target needs adjusting. Stable weight alone does not show whether you lost fat or gained muscle.

[Download on the App Store](https://apps.apple.com/app/recomp-ai-body-recomposition/id6749103634?pt=127576777&ct=recompai_website&mt=8)

[Android waitlist](https://www.recompai.com/auth/sign-up)

## References

- [Murphy C, Koehler K. Energy deficiency impairs resistance training gains in lean mass but not strength: A meta-analysis and meta-regression. Scand J Med Sci Sports, 2022;32(1):125-137.](https://pubmed.ncbi.nlm.nih.gov/34623696/)
- [Antonio J, Ellerbroek A, et al. A high protein diet (3.4 g/kg/d) combined with a heavy resistance training program improves body composition in healthy trained men and women: a follow-up investigation. J Int Soc Sports Nutr, 2015;12:39.](https://doi.org/10.1186/s12970-015-0100-0)
- [Longland TM, Oikawa SY, et al. Higher compared with lower dietary protein during an energy deficit combined with intense exercise promotes greater lean mass gain and fat mass loss. Am J Clin Nutr, 2016.](https://pubmed.ncbi.nlm.nih.gov/26817506/)
- [Garthe I, Raastad T, et al. Effect of two different weight-loss rates on body composition and strength and power-related performance in elite athletes. Int J Sport Nutr Exerc Metab, 2011.](https://pubmed.ncbi.nlm.nih.gov/21558571/)
- [Mountjoy M, Sundgot-Borgen J, et al. The IOC consensus statement: beyond the female athlete triad, relative energy deficiency in sport (RED-S). Br J Sports Med, 2014.](https://pubmed.ncbi.nlm.nih.gov/24620037/)
- [Barakat C, Pearson J, Escalante G, Campbell B, De Souza EO. Body recomposition: can trained individuals build muscle and lose fat at the same time? Strength Cond J, 2020;42(5):7-21.](https://doi.org/10.1519/ssc.0000000000000584)
- [Padwal R, Leslie WD, Lix LM, Majumdar SR. Relationship among body fat percentage, body mass index, and all-cause mortality: a cohort study. Ann Intern Med, 2016;164:532-41.](https://pubmed.ncbi.nlm.nih.gov/26954388/)
- [Jayedi A, Khan TA, Aune D, Emadi A, Shab-Bidar S. Body fat and risk of all-cause mortality: a systematic review and dose-response meta-analysis of prospective cohort studies. Int J Obes, 2022;46:1573-81.](https://pubmed.ncbi.nlm.nih.gov/35717418/)

## Related calculators

[BMI Calculator Population orientation. The screening lens before any plan is built.](https://www.recompai.com/tools/bmi)

[TDEE Calculator Daily calorie needs from your weight and activity level.](https://www.recompai.com/tools/tdee)

[How to read your body fat percentage Put a body fat estimate in context before choosing a calorie target.](https://www.recompai.com/resources/bodyfat-body-composition)

[Body recomposition calculator Estimate maintenance, a calorie and protein target, and a 12-week fat and lean-mass projection. Results depend on the model assumptions and your response.](https://www.recompai.com/body-recomposition-calculator)

[Body recomposition guide Lose fat and build muscle at once. The three levers, the timeline, and how to know it is working.](https://www.recompai.com/body-recomposition)

## Related

- [All calculators](https://www.recompai.com/tools)
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- [Body Recomposition: Lose Fat and Build Muscle at Once](https://www.recompai.com/body-recomposition)

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