Fat kilograms

The calculator estimates fat mass from the fat percent and treats the entered lean mass as fat-free mass. Waist and protein per kilogram sit beside the fat kilograms. Grip strength is a note. In the first example the result is 18.7 kg.

The calculator is not a DEXA result and does not weigh you. The calculator estimates fat mass from the fat percent and treats the entered lean mass as fat-free mass. Waist and protein per kilogram sit beside the fat kilograms. Grip strength is a note.

Input data

Parametry podstawowe modelu

Results

Enter data and click Calculate.

How it works

The calculator uses the numbers you enter. The calculator estimates fat mass from the fat percent and treats the entered lean mass as fat-free mass. Waist and protein per kilogram sit beside the fat kilograms. Grip strength is a note. In the first example the result is 18.7 kg.

The five form fields are Body fat, Estimated lean mass, Waist circumference, Daily protein, and Grip strength for body size. Fat mass means: This is the main result on this page. In the first example it is 18.7 kg. Body fat means: The first form field. It enters the formula or sits beside the result. The calculator estimates fat mass from the fat percent and treats the entered lean mass as fat-free mass. Waist and protein per kilogram sit beside the fat kilograms. Grip strength is a note. Estimated lean mass means: The second form field. The calculator is not a DEXA result and does not weigh you.

The second example gives 14.7 kg. The third example gives 21.5 kg. The calculator estimates fat mass from the fat percent and treats the entered lean mass as fat-free mass. Waist and protein per kilogram sit beside the fat kilograms. Grip strength is a note. In the first example the result is 18.7 kg.

The calculator is not a DEXA result and does not weigh you.

Enter 28, 48, 88, 1.2, 6, then click Calculate. A comma in 12.5 is read the same way as a period. Fields on a 0-10 scale are notes and are not the primary result unless this page formula says so.

Formula

The calculator estimates fat mass from the fat percent and treats the entered lean mass as fat-free mass. Waist and protein per kilogram sit beside the fat kilograms. Grip strength is a note.

What these numbers mean

In the first example the result is 18.7 kg. The calculator estimates fat mass from the fat percent and treats the entered lean mass as fat-free mass. Waist and protein per kilogram sit beside the fat kilograms. Grip strength is a note.

Fat mass
This is the main result on this page. In the first example it is 18.7 kg.
Body fat
The first form field. It enters the formula or sits beside the result. The calculator estimates fat mass from the fat percent and treats the entered lean mass as fat-free mass. Waist and protein per kilogram sit beside the fat kilograms. Grip strength is a note.
Estimated lean mass
The second form field. The calculator is not a DEXA result and does not weigh you.

How to use

  1. Enter Body fat 28.
  2. Add Estimated lean mass 48, Waist circumference 88, Daily protein 1.2, Grip strength for body size 6.
  3. Click Calculate. The result is 18.7 kg.
  4. The second example gives 14.7 kg. The third example gives 21.5 kg.
  5. The calculator is not a DEXA result and does not weigh you.

Examples

Example 1

  • Body fat 28
  • Estimated lean mass 48
  • Waist circumference 88
  • Daily protein 1.2
  • Grip strength for body size 6

18.7 kg

The calculator estimates fat mass from the fat percent and treats the entered lean mass as fat-free mass. Waist and protein per kilogram sit beside the fat kilograms. Grip strength is a note. In the first example the result is 18.7 kg.

Example 2

  • Body fat 22
  • Estimated lean mass 52
  • Waist circumference 78
  • Daily protein 1.6
  • Grip strength for body size 8

14.7 kg

The calculator estimates fat mass from the fat percent and treats the entered lean mass as fat-free mass. Waist and protein per kilogram sit beside the fat kilograms. Grip strength is a note. In the second example the result is 14.7 kg.

Example 3

  • Body fat 35
  • Estimated lean mass 40
  • Waist circumference 102
  • Daily protein 0.8
  • Grip strength for body size 4

21.5 kg

The calculator estimates fat mass from the fat percent and treats the entered lean mass as fat-free mass. Waist and protein per kilogram sit beside the fat kilograms. Grip strength is a note. In the third example the result is 21.5 kg.

Related calculators

Common questions

What does 18.7 kg mean?

In the first example the result is 18.7 kg. The calculator estimates fat mass from the fat percent and treats the entered lean mass as fat-free mass. Waist and protein per kilogram sit beside the fat kilograms. Grip strength is a note.

What is the second example?

With the second set of fields the result is 14.7 kg.

What is the third example?

With the third set of fields the result is 21.5 kg.

How is the result calculated?

The calculator estimates fat mass from the fat percent and treats the entered lean mass as fat-free mass. Waist and protein per kilogram sit beside the fat kilograms. Grip strength is a note.

What does the calculator not do?

The calculator is not a DEXA result and does not weigh you.

What do Fat mass, Body fat (%), and Estimated lean mass (kg) mean?

This is the main result on this page. In the first example it is 18.7 kg. The first form field. It enters the formula or sits beside the result. The calculator estimates fat mass from the fat percent and treats the entered lean mass as fat-free mass. Waist and protein per kilogram sit beside the fat kilograms. Grip strength is a note. The second form field. The calculator is not a DEXA result and does not weigh you.

Does a comma in 12.5 work?

Yes. 12.5 and 12,5 are read the same way.

Are 0-10 fields the primary result?

No. Fields on a 0-10 scale are notes, unless this page formula counts marked items from them. The primary result comes from this page formula.

How are fat kilograms calculated?

The calculator estimates fat mass from the fat percent and treats the entered lean mass as fat-free mass. Waist and protein sit beside those kilograms.

Is this a DEXA result?

No. The calculator is not a DEXA result and does not weigh you. Grip strength is a note.

Where do I get fat percent?

From the method you use: skinfolds, bioimpedance, or a clinic report. The calculator does not measure body composition.

Does protein per kilogram enter the formula?

No. Protein and waist sit beside the fat kilograms. The main result comes from fat percent and lean mass.

What if I do not know lean mass?

Without that number the fat estimate lacks the fat-free mass this page uses. Enter the measurement you have, or leave the field empty and see whether a result appears.

Sources

The calculator estimates fat mass from the fat percent and treats the entered lean mass as fat-free mass. Waist and protein per kilogram sit beside the fat kilograms. Grip strength is a note. The calculator is not a DEXA result and does not weigh you.

Page updated in 2026.