The Utility Base

📐 Body Fat Calculator

What is Body Fat Percentage?

Body fat percentage is the proportion of fat in your total body weight. It reflects health and physique more accurately than BMI by distinguishing between muscle and fat mass.

📏 Calculation Methods

US Navy Formula:

Male: 495 / (1.0324 - 0.19077×log10(waist-neck) + 0.15456×log10(height)) - 450

Female: 495 / (1.29579 - 0.35004×log10(waist+hip-neck) + 0.22100×log10(height)) - 450

BMI-Based Estimate:

Adult Male: (1.20 × BMI) + (0.23 × age) - 16.2

Adult Female: (1.20 × BMI) + (0.23 × age) - 5.4

BMI Calculator

Your BMI
24.2
Category
Overweight
Ideal Weight Range
53.5 - 66.2 kg

BMI Classification

BMI RangeCategory
18.5 belowUnderweight
18.5 - 22.9Normal
23 - 24.9Overweight
25 - 29.9Obese
30 aboveSeverely Obese

* Asian standard (WHO Asia-Pacific criteria)

🏃

BMI Result

24.2

✨ Overweight

Height 170cm, Weight 70kg

🔎 Compare results

Compare outcomes by conditions

#BMICalculator #Health #Fitness #Weight #Wellness

What is BMI?

BMI (Body Mass Index) is a measure that uses your height and weight to assess your health status. It is calculated by dividing your weight in kilograms by your height in meters squared.

BMI Formula

BMI = weight(kg) ÷ height(m)²

BMI = weight(kg) ÷ height(m)². For example, a person weighing 70kg and 175cm tall has a BMI of 70 ÷ 1.75² = 22.9.

Healthy Weight Management Tips

  • ✓BMI is just a reference indicator; it doesn't account for muscle mass or body fat percentage
  • ✓Regular exercise and a balanced diet are important
  • ✓Rapid weight changes can be harmful to your health
  • ✓Consult a healthcare professional for accurate health assessment

📊 Body Fat Categories

CategoryMaleFemaleDescription
Essential Fat2-5%10-13%Minimum for survival (risky)
Athletes6-13%14-20%Peak performance level
Fitness14-17%21-24%Healthy and fit physique
Average18-24%25-31%Acceptable health range
Obese25%+32%+Increased health risks

🔬 Body Fat Measurement Methods

MethodAccuracyCostAccess
DEXA Scan±1-2%HighMedical facilities
Hydrostatic±2-3%MediumSpecialized facilities
InBody (BIA)±3-5%LowGym/Home
Skinfold Calipers±3-5%Very LowHome/Trainer
US Navy Formula±3-5%FreeAnywhere

🎯 Reducing Body Fat

  • Maintain moderate calorie deficit (300-500kcal/day)
  • Adequate protein intake (1.6-2.2g per kg bodyweight)
  • Resistance training to preserve muscle
  • At least 150 min cardio per week
  • Adequate sleep (7-9 hours)
  • Stress management (lower cortisol)

❓ FAQ

Which is more important: BMI or body fat %?

Body fat % reflects health more accurately. BMI cannot distinguish muscle from fat, while body fat % shows actual fat mass. Measure both if possible.

How fast can I reduce body fat?

A healthy, sustainable rate is 0.5-1% per week, equivalent to 0.5-1kg weight loss. Faster rates cause muscle loss and metabolic slowdown.

Why do women have higher body fat than men?

Women need more essential fat for reproductive function and hormonal regulation. Fat is stored in breasts, hips, and thighs - a healthy physiological feature.

What happens if body fat is too low?

Hormonal imbalance, weakened immunity, fatigue, hair loss, and menstrual irregularities in women. Do not maintain below 5% (men) or 12% (women) long-term.

💡 Measure under consistent conditions: morning, fasted, before exercise, same device. Trends matter more than single measurements.

🔗Related Calculators

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Calorie Calculator

Daily calorie needs

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Compound Interest

Calculate compound growth

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Net Worth

Assets minus debts

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Prepayment Fee

Loan prepayment penalty

📚 Local Method & Assumption Guide

Formula Logic

Core formulas use public finance, loan, ratio, and unit conversion standards.

Source Scope

References follow publicly available standards and country-level common practices.

Assumptions

Taxes, fees, rates, and limits vary by region and institution.

Result Interpretation

Use this result as a baseline scenario. For decisions, compare with your lender quote and local tax treatment.

Locale Preset

Currency: USD

Units: imperial

Tax logic: US payroll estimate

Regulatory Note

This tool uses regional presets for estimation. Contract terms and legal limits may differ by lender, bank, or local law.

Recommended Next Actions

  • Compare at least 2-3 local providers before final submission.
  • Re-check fees, tax treatment, and prepayment clauses in writing.
  • Run a stress scenario with +1-2% interest and lower income.

Before a real financial decision, confirm with local institution rules.

View policy details