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BMI Calculator – Body Mass Index Online

Enter your weight and height to instantly get your body mass index (BMI), your World Health Organization category and the healthy weight range for your height.

🔗 Direct link sahlify.uk/en/bmi-calculator/

How does it work?

Type or paste your data.
The result appears instantly.
Copy or download the result.

Why use BMI Calculator?

✓ 100% free, no limits, no watermark
✓ No sign-up, no install
🔒 Files processed locally: full privacy
📱 Works on desktop, tablet and mobile

Frequently asked questions

How is BMI calculated?

BMI = weight (kg) ÷ height² (m). For example 70 kg at 1.75 m gives a BMI of 22.9.

What is a normal BMI?

According to the WHO, a BMI between 18.5 and 24.9 is a normal weight for an adult.

What is a normal BMI?

Between 18.5 and 24.9 for adults according to the WHO.

Does BMI replace medical advice?

No, it is a general indicator; see a health professional for a personal assessment.

Is this tool really free?

Yes, 100% free, with no sign-up, no watermark and no usage limit.

Are my files safe?

Yes. Processing happens directly in your browser: your files are never uploaded to a server or stored.

When to use it

BMI (body mass index) gives a first indication of an adult's build: underweight, normal, overweight or obese according to WHO thresholds. It is a benchmark to track weight or discuss with a doctor.

Our tips

💡 BMI = weight (kg) ÷ height² (m). Example: 70 ÷ 1.75² ≈ 22.9.
💡 BMI does not distinguish muscle from fat: an athlete may be “overweight” without excess fat.
💡 For children and teenagers, use growth charts.