BMI Calculator
PopularCalculate Body Mass Index and identify healthy weight ranges for adults
kg
cm
This calculator provides general informational estimates based on standard clinical formulas and is not a substitute for professional medical advice, diagnosis, or treatment.
Calculation ResultNormal weight
Body Mass Index (BMI)
22.9
Healthy weight range: 56.7 kg - 76.3 kgCategory
Normal weight
Healthy Weight Min
56.7 kg
Healthy Weight Max
76.3 kg
How this calculator works
1
Select Metric (kg, cm) or Imperial (lbs, feet & inches).
2
Enter your weight and height.
3
View your BMI score, clinical weight category, and target healthy weight range.
Formula & Mathematics
Body Mass Index (BMI) Formula
BMI = weight (kg) / [height (m)]²
WHO standard metric formula for adult body mass assessment. For imperial: 703 × weight (lbs) / [height (in)]².
Worked Example
70 kg adult with 175 cm height
Height = 1.75 meters, Weight = 70 kg.
• BMI = 70 / (1.75 × 1.75) = 70 / 3.0625 = 22.86
• Normal Weight Range: 18.5 to 24.9
BMI is 22.9, which falls perfectly in the Normal Healthy Weight category.
Frequently Asked Questions
BMI does not distinguish between muscle mass and body fat. Athletes with high muscle mass may be classified as overweight despite having low body fat.
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