CalcQuick

BMI Calculator

Calculate your body mass index (BMI) in metric or imperial units and see where it falls on the WHO weight classification.

cm
kg

Your BMI

22.9

Normal weight

BMI reference (WHO)

Underweight< 18.5
Normal weight18.5 – 24.9
Overweight25.0 – 29.9
Obese≥ 30.0

* Based on the WHO adult BMI classification. Results are for informational purposes only.

Results are for informational purposes only and do not replace professional medical advice.

How to use

  1. Choose metric (cm / kg) or imperial (ft / lbs).
  2. Enter your height and weight.
  3. See your BMI value and weight category instantly.

Formula

Metric: BMI = weight in kilograms ÷ (height in meters)².

Imperial: BMI = (weight in pounds × 703) ÷ (height in inches)².

Example

For a person who is 175 cm tall and weighs 70 kg:

BMI = 70 ÷ (1.75)² = 22.9, which falls in the normal weight range.

Frequently asked questions

What is a healthy BMI?
According to the WHO, a healthy BMI for most adults is between 18.5 and 24.9. This range is associated with the lowest health risk for most people.
Does BMI apply to athletes or bodybuilders?
BMI does not distinguish between muscle and fat. Very muscular people may have a high BMI without excess body fat.
Can I use this calculator for children?
No. BMI interpretation for children and teens is age- and sex-specific. Use a pediatric BMI percentile calculator instead.
What are the limitations of BMI?
BMI is a screening tool, not a diagnostic of body fatness or health. It does not account for muscle mass, bone density, fat distribution, or individual health conditions.
What is a good BMI for a woman?
For most adult women, a BMI between 18.5 and 24.9 is considered normal weight according to WHO standards.
What is a good BMI for a man?
For most adult men, a BMI between 18.5 and 24.9 falls in the normal weight range with the lowest general health risk.

Related calculators

Calorie Calculator

Estimate your daily calorie needs based on age, weight, height and activity level.

BMR Calculator

Calculate your basal metabolic rate — calories burned at rest using the Mifflin-St Jeor equation.

Ideal Weight Calculator

Find your ideal body weight range using Robinson, Devine, Miller and Hamwi formulas.