Toolram

BMI calculator

Calculate your Body Mass Index and health category.

About BMI calculator

BMI is a measure of weight-to-height ratio used as an initial nutritional indicator. Remember: BMI doesn't differentiate muscle from fat, so it's only a guide.

Why use Toolram

  • 🔒 100% private
    Your data never leaves your browser.
  • ⚡ No waiting
    Instant results, no uploads.
  • 📱 Works on mobile
    Optimized responsive design.
  • 🎁 Forever free
    No signup, no watermark.

Frequently asked questions

What is a healthy BMI range?

The WHO considers 18.5 to 24.9 normal weight. Below that is underweight and above it is overweight, with obesity from 30.

Why is BMI unreliable for athletes?

Because it only knows height and weight. Muscle is denser than fat, so a very fit person can score as «overweight» while carrying little fat.

Does it work with pounds and inches?

Yes, you can switch units. The formula is the same; only the conversion factor changes.

🇲🇽 También disponible en español