Calculate your Body Mass Index (BMI) instantly. Enter your weight and height to get your BMI score and health category.
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BMI Calculator
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BMI Formula
Formula
BMI = weight(kg) ÷ height(m)²
Divide your weight in kilograms by the square of your height in metres. Example: 70kg ÷ (1.75m)² = 22.9. Under 18.5 = Underweight · 18.5–24.9 = Normal · 25–29.9 = Overweight · 30+ = Obese
Frequently Asked Questions
What is a healthy BMI?+
A BMI between 18.5 and 24.9 is considered healthy for most adults. Athletes may have a higher BMI due to increased muscle mass.
Is BMI accurate for everyone?+
BMI is a useful screening tool but doesn't account for muscle mass, bone density, age, or ethnicity. It is best used alongside other health assessments.
What is the BMI formula?+
BMI = weight in kilograms divided by height in metres squared. For example, 70kg ÷ 1.75² = 22.86.
Is this BMI calculator free?+
Yes, Calcivus BMI calculator is completely free with no signup required.