BMI Calculator
Calculate your Body Mass Index in metric or imperial units and see the healthy weight range for your height.
Runs in your browser — nothing is uploadedEnter values
Units
Result
- Healthy weight for your height
- 56.7 kg – 76.3 kg
- Healthy BMI range
- 18.5 – 24.9
How it's calculated
BMI = weight (kg) ÷ height (m)²
= 70 ÷ 1.75² = 22.9
Categories follow the WHO adult classification. BMI is not designed for children, athletes or pregnancy.
About BMI Calculator
Body Mass Index (BMI) compares your weight with your height to give a quick screening measure of whether your weight is in a healthy range. It is widely used by doctors, insurers and fitness programs.
Enter your weight and height in metric or imperial units to see your BMI, the category it falls in and the healthy weight range for your height.
When to use it
- Checking whether your weight is in a healthy range.
- Tracking progress during a weight loss or gain plan.
- Setting a realistic target weight for your height.
- Health and fitness assessments.
Tips for better results
- Measure weight at the same time of day for consistent tracking.
- Combine BMI with waist measurement for a better picture of health risk.
- Talk to a doctor before starting a major diet or exercise change.
How to use the BMI Calculator
- Choose metric or imperial units.
- Enter your weight and height.
- See your BMI and category.
Frequently asked questions
What is a healthy BMI?
For adults, the WHO classes 18.5–24.9 as a healthy weight, 25–29.9 as overweight and 30 or more as obesity.
Is BMI accurate for everyone?
No. BMI doesn't distinguish muscle from fat and isn't suitable for children, pregnancy or very muscular people. It is a screening tool, not a diagnosis.
How is BMI calculated?
BMI = weight in kilograms ÷ (height in meters)². For example, 70 kg at 1.75 m gives 70 ÷ 3.06 ≈ 22.9.
Are BMI ranges different for Asian populations?
Some health bodies, including the WHO for Asian populations, suggest lower cut-offs because health risks can rise at lower BMIs — for example treating 23 and above as overweight. Ask your doctor which ranges apply to you.