Body Fat Percentage Calculator

Estimate your body fat percentage and lean muscle mass using the U.S. Navy circumference method — the standard military measurement formula.

BMR
1,659 kcal
Calories at total rest
Maintenance (TDEE)
2,571 kcal
Calories to stay the same weight
Your target
2,571 kcal/day
Adjusted for your goal
SUGGESTED DAILY MACROS
Protein20%
126g
Fat25%
71g
Carbs55%
356g

Estimates only — individual metabolism varies. Consult a doctor or registered dietitian before making major dietary changes.

Today's Food Log

Search foods, select unit (grams, slices, pieces, cups, oz...), and track your daily macros.

TOOLS THAT MAKE HITTING YOUR TARGET EASIER
Meal prep containers
Portion-controlled sets that make hitting your target calories easier.
Shop →
Kitchen food scale
Accurate gram measurements — the single biggest upgrade for calorie tracking.
Shop →
Whey / plant protein powder
A fast way to hit your daily protein target from the macros below.
Shop →
Affiliate disclosure: links above may earn us a commission — this never affects the calculation results above.
⚕️MEDICAL & YMYL DISCLAIMERReviewed August 2026

Educational Purpose Only: The calculations, formulas, and estimates provided by this calorie & nutrition calculator are intended solely for educational, research, and informational purposes. They do not constitute medical advice, diagnosis, or personalized treatment plans.

Always consult a qualified healthcare professional, physician, or registered dietitian before making changes to your diet, exercise regimen, calorie intake, or pregnancy care plan. Never disregard or delay professional medical advice because of something you read on this website.

SCIENTIFIC FORMULA & METHODOLOGY
U.S. Navy Body Fat Formula (Hodgdon & Beckett)
Men: %BF = 495 / (1.0324 - 0.19077 × log10(waist - neck) + 0.15456 × log10(height)) - 450
Women: %BF = 495 / (1.29579 - 0.35004 × log10(waist + hip - neck) + 0.22100 × log10(height)) - 450

Developed by the Naval Health Research Center, this method correlates body circumferences with hydrostatic weighing results with ±3-4% accuracy.

Clinical Limitations & Considerations

Circumference measurements are estimates. DEXA scans and hydrostatic underwater weighing remain the clinical gold standards.

Scientific References & Literature

  • Hodgdon, J. A., & Beckett, M. B. (1984). "Prediction of body fat for U.S. Navy men and women from body circumferences." Naval Health Research Center Report.

Frequently Asked Questions

What is a healthy body fat percentage?

For men: 10-20% is typical fitness/healthy range. For women: 18-28% represents the healthy average range.

Related Nutrition & Fitness Tools

🍽️ BMR (Basal Metabolic Rate)🍽️ TDEE (Total Daily Energy Expenditure)🍽️ Ideal Body Weight (IBW)🍽️ Calorie Deficit & Weight Loss⚙️ Main Calorie Calculator →
RELATED UTILITIES

More Tools in This Category

Security & Health

Password Strength Checker

See how strong a password is and how long it would take to crack — checked 100% in your browser.

Open tool →
Security & Health

Pregnancy Due Date & Ovulation Calculator

Estimate your due date, current week of pregnancy, or your next ovulation and fertile window.

Open tool →
DISCOVER MORE

Popular Specialized Calculators & Converters

📐
Passport Photo ResizerExact 2×2 in / 600×600px at 300 DPI
📄
Merge PDF OnlineCombine multiple PDF files into one
🔄
JSON to CSV ConverterConvert JSON objects to CSV tables
🔒
Strong Password GeneratorCreate 24+ char uncrackable keys
⚡
Email Validation RegexRFC-compliant email regex pattern
⏰
Every 5 Mins Cron*/5 * * * * schedule generator
EXPLORE ALL TOOL SUITES
🔄Unit Conversions🖼️Image Resizer📄PDF Tools📊Data Converter📱QR Generator🔒Password Checker⚡Regex Tester🕐Cron Builder🖨️DPI Calculator📏Screen Ruler🎨Color Tools📐Aspect Ratio🥗Health Calculators