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Calculators

BMI Calculator

Calculate your Body Mass Index with a healthy weight range — metric or imperial.

Your BMI
23.5
Healthy

Healthy weight range for your height: 56.7–76.3 kg.

UnderweightHealthyOverweightObeseSevere

BMI is a rough screening tool — it does not account for muscle mass, frame size, or body composition. For medical decisions, consult a clinician.

How it works

  1. 1Switch between metric (kg, cm) and imperial (lb, ft·in).
  2. 2Enter your height and weight.
  3. 3Read your BMI, category, and healthy weight range.

Use cases

  • Get a rough sense of where you fall on the BMI scale.
  • Find the healthy weight range for your height.
  • Track changes alongside other fitness signals.

Frequently asked questions

Is BMI accurate for everyone?

No. BMI does not distinguish between muscle and fat, and is less reliable for athletes, children, the elderly, and people with very tall or short frames.

What are the BMI categories?

Underweight: <18.5 · Healthy: 18.5–24.9 · Overweight: 25–29.9 · Obese: 30–34.9 · Severely obese: ≥35.

Can BMI replace a doctor visit?

No. BMI is one rough screening signal among many. For medical decisions, consult a clinician.

Read the guide
How to read a BMI number honestly
BMI is one number among many. Here is what it does and does not tell you, and how to read the result without dramatizing it.

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