Health & fitness

BMI calculator

Calculate your body mass index and its category (adults).

Embed this calculator on your website

Copy this code and paste it into your page (WordPress, Wix, Webflow, HTML…). It's free: please keep the link to HOD Calc.

How it works

BMI = weight (kg) / height (m)². WHO adult ranges: under 18.5 underweight, 18.5–25 healthy, 25–30 overweight, 30+ obesity. A general indicator, not a diagnosis.

Results are for guidance only and do not replace professional advice.

Worked example

With the default values:

  • Weight (kg)70
  • Height (cm)175

you get:

  • BMI22.9
  • Category (WHO)Healthy weight
  • Healthy range for this height56.7 – 76.3 kg

Frequently asked questions

How does the “BMI calculator” tool work?

BMI = weight (kg) / height (m)². WHO adult ranges: under 18.5 underweight, 18.5–25 healthy, 25–30 overweight, 30+ obesity. A general indicator, not a diagnosis.

What do I need to enter?

Just fill in: weight, height. The result updates as you type.

Can you give an example?

Weight (kg): 70; Height (cm): 175 → BMI: 22.9; Category (WHO): Healthy weight.

Is this calculator free, and is my data private?

Yes. HOD Calc is completely free with no sign-up. The calculation runs in your browser: nothing you type is sent or stored.