Estimate your body fat percentage quickly using your height, weight, age, and gender. This calculator provides a simple and effective way to understand your body composition without specialised equipment.
✔ Body fat percentage • ✔ Fitness categories • ✔ Health assessment • ✔ Free calculator
This Body Fat Calculator estimates your body fat percentage using your height, weight, age, and gender. Body fat percentage is one of the most useful measurements for understanding body composition because it estimates how much of your body weight comes from fat tissue rather than muscle, bone, organs, and water.
Unlike weight alone, body fat percentage provides a clearer picture of overall fitness and health. Two people can weigh exactly the same but have very different body fat percentages depending on their muscle mass and body composition.
This calculator uses a recognised body fat estimation formula based on Body Mass Index (BMI), age, and gender.
The process works in two stages:
Although this method is not as precise as laboratory testing, it provides a quick and useful estimate for most people.
Body fat percentage often provides more useful information than body weight alone.
For example, two people may both weigh 80 kg:
Although their weight is identical, their body composition and health profile may be very different.
Understanding body fat percentage can help:
| Body Fat % | Category |
|---|---|
| 2–5% | Essential Fat |
| 6–13% | Athletes |
| 14–17% | Fitness |
| 18–24% | Healthy Range |
| 25%+ | Higher Body Fat |
| Body Fat % | Category |
|---|---|
| 10–13% | Essential Fat |
| 14–20% | Athletes |
| 21–24% | Fitness |
| 25–31% | Healthy Range |
| 32%+ | Higher Body Fat |
This result would generally fall within a healthy body fat range for an adult male.
This result would generally fall within a healthy body fat range for an adult female.
| BMI | Body Fat % |
|---|---|
| Based on height and weight | Estimates actual fat tissue |
| Simple screening tool | Provides more body composition detail |
| Cannot distinguish muscle from fat | Better reflects overall body composition |
BMI and body fat percentage are often used together to provide a more complete picture of health.
This calculator provides an estimate and should not be considered a medical measurement.
Actual body fat percentage may vary depending on:
Athletes and highly muscular individuals may receive less accurate estimates because BMI-based formulas do not fully account for increased muscle mass.
Professional methods used to measure body fat include:
These methods are generally more accurate but often require specialist equipment or professional assessment.
Is BMI the same as body fat percentage?
No. BMI is based only on height and weight, while body fat percentage estimates how much of your body weight is made up of fat.
What body fat percentage is considered healthy?
Healthy ranges vary by age and gender, but most adult men fall within 18–24% and most adult women within 25–31%.
Can athletes have very low body fat?
Yes. Many athletes have body fat percentages below the average healthy range while maintaining excellent health and fitness.
How often should I check body fat?
Checking every few weeks is usually sufficient for monitoring long-term progress.
Is this calculator accurate?
It provides a useful estimate for most people but should not replace professional body composition assessments.
Health-related information is based on publicly available guidance and commonly accepted medical and health calculation methods.
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Last Updated: August 2026