Body Fat Calculator
Estimate your body fat percentage using BMI-based formula.
Personal Information
Body Fat Results
Estimated Body Fat
18.0%
Category
Fitness
Real-World Examples
See how calculations work across different profiles.
Athletic Male
170 lbs, 5'10", 32" waist, 15" neck
12.5%
Body fat
Fit Female
135 lbs, 5'5", 28" waist, 13" neck
22.1%
Body fat
Average Adult
180 lbs, 5'9", 36" waist, 16" neck
28.3%
Body fat
Reference Data
| Category | Men (% fat) | Women (% fat) |
|---|---|---|
| Essential | 2-5% | 10-13% |
| Athletic | 6-13% | 14-20% |
| Fitness | 14-17% | 21-24% |
| Average | 18-24% | 25-31% |
| Obese | 25%+ | 32%+ |
Frequently Asked Questions
Related Calculators
BMR Calculator
Calculate your Basal Metabolic Rate using Mifflin-St Jeor or Harris-Benedict formulas.
TDEE Calculator
Calculate your Total Daily Energy Expenditure using activity multipliers.
RMR Calculator
Calculate your Resting Metabolic Rate.
Exercise Calorie Burn Calculator
Estimate calories burned during exercise using MET values.
Related Articles
What Is TDEE? How to Calculate Your Daily
Understand what TDEE (Total Daily Energy Expenditure) is, its three components, and how to calculate your daily calorie burn with activity multipliers.
What Is a Calorie Deficit? How It Works and How
A beginner-friendly guide to understanding what a calorie deficit is, how it scientifically produces weight loss, and how to calculate your perfect deficit for sustainable results.
BMR vs RMR: What's the Difference and Which
Learn the key differences between BMR (Basal Metabolic Rate) and RMR (Resting Metabolic Rate), how they're measured, and which one is right for your nutrition plan.
Related Guides
Body Composition Testing Methods: A Complete
Compare all major body composition testing methods from DEXA to home scales. Learn about accuracy, cost, accessibility, and best use cases for each.
Body Fat Calipers Comparison: Which Caliper Is
Compare the top body fat calipers on the market. Learn about different caliper types, features, accuracy, and price points to find the best tool for.
Body Fat Percentage Ranges by Age and Gender
Discover healthy body fat percentage ranges for different ages and genders. Learn how body fat changes throughout life and what percentage is optimal.
DEXA Scan for Body Composition: The Gold
Learn about DEXA (Dual-Energy X-ray Absorptiometry) scanning—the gold standard for body composition measurement. Discover how it works, what it.
Frequently Asked Questions
How accurate is this body fat estimator?
This calculator uses a BMI-based formula providing rough estimates. For accurate measurement, DXA, hydrostatic weighing, or skinfold calipers are more reliable.
What are healthy body fat ranges?
Men: Essential 2-5%, Athletic 6-13%, Fitness 14-17%, Average 18-24%, Obese 25%+. Women: Essential 10-13%, Athletic 14-20%, Fitness 21-24%, Average 25-31%, Obese 32%+.
How do I measure waist and neck?
Waist: measure at the narrowest point between ribs and hips, snug but not tight. Neck: measure just below the larynx, level and snug.
Can body fat be too low?
Yes. Extremely low body fat can cause hormonal imbalances and organ damage. Men should maintain at least 2-5% essential fat, women 10-13%.
Why does body fat distribution matter?
Central obesity (apple shape) is associated with higher health risks than peripheral obesity (pear shape). Waist-to-hip ratio is a useful indicator.
Educational use only. This calculator provides estimates for educational and informational purposes. It is not medical, nutritional, or dietary advice. Consult a registered dietitian or healthcare provider for personalized guidance.
Last updated: 2026 · CalorieFig Editorial Team