BMI Calculator
FREECalculate your Body Mass Index (BMI) instantly in metric or imperial units with health range indicators.
Enter your weight and height to calculate BMI
BMI Categories
Underweight
BMI < 18.5
Normal weight
BMI 18.5 – 24.9
Overweight
BMI 25 – 29.9
Obese
BMI ≥ 30
⚠️ BMI is a screening tool, not a diagnostic measure. Consult a healthcare professional for personalized advice.
📖 How to Use BMI Calculator
1
Enter your height
Input your height in centimetres or feet/inches.
2
Enter your weight
Input your weight in kilograms or pounds.
3
View your BMI
Your BMI is calculated instantly and compared to WHO health ranges.
💡 Examples
Healthy range
INPUT
Height: 175 cm, Weight: 70 kg→
OUTPUT
BMI: 22.9 — Normal weightOverweight range
INPUT
Height: 5'10", Weight: 200 lbs→
OUTPUT
BMI: 28.7 — OverweightLower normal range
INPUT
Height: 160 cm, Weight: 50 kg→
OUTPUT
BMI: 19.5 — Normal weight🚀 Pro Tips
✓BMI is a screening tool, not a diagnostic — it does not account for muscle mass, bone density, or fat distribution.
✓Athletes with high muscle mass often have a high BMI without excess body fat.
✓WHO ranges: Underweight < 18.5, Normal 18.5–24.9, Overweight 25–29.9, Obese ≥ 30.
✓For children and teens, use age- and sex-specific BMI percentiles, not adult ranges.
✓Combine BMI with waist circumference for a more complete health picture.