BMI Calculator
Calculate your Body Mass Index. Supports metric (cm/kg) and imperial (ft-in/lb) units.
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Your BMI
24.2
Normal weight
BMI Scale
â–²
Underweight: < 18.5
Normal: 18.5 - 24.9
Overweight: 25 - 29.9
Obese: ≥ 30
Healthy Weight Range
For your height (170 cm), a healthy weight is 53.5 kg - 72.0 kg
Frequently Asked Questions
What is a healthy BMI range?
A BMI between 18.5 and 24.9 is considered normal weight. Below 18.5 is underweight, 25-29.9 is overweight, and 30 or above is classified as obese.
How accurate is BMI as a health indicator?
BMI is a useful screening tool but does not account for muscle mass, bone density, age, or body fat distribution. Athletes with high muscle mass may have a high BMI despite being healthy.
How is BMI calculated?
BMI is calculated by dividing your weight in kilograms by your height in meters squared: BMI = kg / m². For imperial units, the formula is (weight in pounds × 703) / (height in inches)².
Does BMI apply the same way to all age groups?
Standard BMI categories apply to adults 20 and older. For children and teens, BMI is interpreted using age- and sex-specific percentile charts from the CDC.