Body Fat Mass Calculator
Calculate total body fat mass based on body weight and body fat percentage.
Calculate total body fat mass based on body weight and body fat percentage. Enter your Total Body Weight, Body Fat Percentage to get an instant body fat mass. Formula: weight * (body_fat_percentage / 100).
Body Fat Mass
Fill in the fields above and click Calculate
Comparison ()
| Field | |
|---|---|
| Result |
Formula
Step-by-step
Variables
Recent Calculations
How It Works
How It Works
The Body Fat Mass Calculator finds how much of your total body weight comes from body fat. It uses your total body weight and multiplies it by your body fat percentage.
First, the calculator converts your body fat percentage into a decimal by dividing it by 100. Then, it multiplies this decimal by your total body weight to calculate your total body fat mass.
- Enter your total body weight (kg or lb)
- Enter your body fat percentage (example: 18 for 18%)
- The percentage is divided by 100 to turn it into a decimal
- Your weight is multiplied by that decimal
- The result is your total body fat mass
Understanding the Results
The result shows how much of your total body weight is made up of fat. The unit of the result will match the unit you used for your body weight (kg or lb).
For example, if you weigh 80 kg and have 20% body fat, the calculator will show 16 kg of body fat. This helps you better understand your body composition and track changes over time.
- The result is the amount of fat in your body
- The unit stays the same as your input weight
- Higher percentages increase total fat mass
- Lower percentages reduce total fat mass
- Useful for tracking fitness and health progress
Frequently Asked Questions
What does the Body Fat Mass Calculator measure?
This calculator determines your total body fat mass based on your total body weight and body fat percentage. It shows how much of your body weight comes specifically from fat. The result is expressed in the same unit (kg or lb) that you use for your body weight.
How do I calculate my body fat mass using this tool?
Simply enter your total body weight and your body fat percentage as a whole number (for example, enter 18 for 18%). The calculator multiplies your weight by your body fat percentage divided by 100. The result is your total body fat mass.
Can I use pounds or kilograms?
Yes, you can use either pounds (lb) or kilograms (kg). Just make sure your body weight is entered in one unit consistently. The result will be displayed in the same unit you used for your weight.
How do I find my body fat percentage?
Body fat percentage can be measured using methods such as DEXA scans, bioelectrical impedance scales, skinfold calipers, or professional fitness assessments. Many smart scales also estimate body fat percentage. Use the most accurate measurement available to you for best results.
Why is knowing my body fat mass useful?
Knowing your body fat mass helps you better understand your body composition beyond just total weight. It can help track fat loss progress, assess fitness goals, and monitor health improvements. For example, if you weigh 80 kg with 20% body fat, your body fat mass is 16 kg.
Does this calculator measure lean body mass?
No, this calculator only determines total body fat mass. To find lean body mass, you would subtract your body fat mass from your total body weight. For example, if you weigh 70 kg and have 14 kg of fat mass, your lean body mass would be 56 kg.
Disclaimer
This health calculator is for informational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Disclaimer.