BodyMetrics Free • BMI & Health

Calculate a client’s BMI and understand the limits of this metric

BMI is a useful starting point to assess a client’s body profile. But on its own, it does not distinguish muscle, bone mass, or body fat.

Back to BodyMetrics Free

Calculate the client’s BMI

Enter weight and height to get a quick estimate.

Tip: measure height barefoot, standing straight against a wall.

BMI provides a first indication.
To understand what is truly changing in the body, the analysis should be completed with waist circumference, body fat, lean mass, and body measurements.

Health risk linked to waist circumference

Measure waist circumference at navel level, standing, after a normal exhale.

“Normal” BMI + high waist circumference = increased cardiometabolic risk.

Waist circumference is a useful complement to BMI.
It provides a more direct view of cardiometabolic risk, especially when body weight alone does not tell the full story.

1 • BMI

Get a first reading

BMI quickly identifies a general trend based on weight and height. It is an initial marker, not a complete assessment.

✓ Weight
✓ Height
✓ Indicative category
2 • Waist circumference

Add a health risk factor

Waist circumference provides useful information on cardiometabolic risk, even when BMI appears normal.

✓ Low risk
✓ High risk
✓ Very high risk
3 • Composition

Go beyond body weight alone

To track real physical progress, you need to distinguish body fat, lean mass, and measurement changes.

✓ Body fat
✓ Lean mass
✓ Real progress

Body weight can stay stable while the body truly changes. That is exactly the limitation of an assessment based only on the scale or BMI.

The limitations you currently face

Stagnant body weight

A client can make physical progress while keeping almost the same body weight. Without another measurement, that progress remains invisible.

Approximate analysis

Isolated calculations or poorly structured methods make follow-up less clear and harder to explain.

Lack of proof

Without concrete data, it becomes harder to justify real progress and maintain the client’s confidence.

Why BodyFat Blueprint goes beyond these limitations

BodyFat Blueprint is designed for coaches who want to go beyond body weight and BMI. It helps analyze body composition with measurements that are more actionable in coaching.

More precise measurements

Body fat percentage, lean mass, BMI, estimated ideal weight, and bone frame can be integrated into a more complete analysis.

Clearer follow-up

The client better understands what is changing: losing fat, maintaining muscle or improving body composition.

Time saving

Automatic calculations reduce approximations and make interpretation faster during follow-up.

Concrete example:
A client can gain 400 g of muscle while losing 1% body fat. On the scale, the change may look small. With body composition analysis, progress becomes visible.

An advanced analysis module for more professional coaching

Back skinfold measurement with a caliper to estimate body fat.

Body fat percentage

Estimate body fat as a percentage and in kilograms.

Lean mass

Track what truly matters when the goal is body recomposition.

Skinfold methods

Easily select the right method: 2-site, 4-site, or 7-site skinfolds.

Enter skinfold measurements with a professional caliper and instantly get results that are more useful than body weight alone.

Interpreting the results

The most credible coaches do not rely only on a bathroom scale. They explain what is truly changing: body fat, lean mass, measurements, and overall trend.

“Well done, you gained 400 g of muscle and lost 1% body fat.”

Yes, it is possible to become leaner while gaining weight. This is the type of analysis clients understand, value, and remember.

Need help mastering these tools?

DietHelper provides complete tutorials to help use the tools, interpret measurements, and increase the value of client follow-up.

Understand the measurements

Know what to measure, how to measure it, and how to avoid rushed interpretations.

Explain it to the client

Turn numbers into clear, concrete, and motivating feedback.

Strengthen follow-up

Add more structure to coaching and reduce decisions based on impressions.

Move to a more complete body analysis

BodyFat Blueprint is integrated into DietHelper. You get a more precise, clearer, and more useful follow-up system to support your clients.

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Try DietHelper free for 7 days

Reference markers used

  • BMI classification: underweight, normal body weight, overweight, and obesity based on commonly used thresholds.
  • Waist circumference: sex-specific thresholds used to estimate increased cardiometabolic risk.
  • These tools provide general indications and do not replace medical advice.