Free BMI Calculator
Check your Body Mass Index by height and weight — free, instant, no signup.
Your BMI is
Healthy BMI range: 18.5 kg/m2 - 25 kg/m2
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What is BMI?
BMI (Body Mass Index) is a simple screening tool that uses your height and weight to estimate whether you are in a healthy weight range. A normal BMI range for adults is 18.5 to 24.9. For Indians and South Asians, health risks begin at a lower BMI — around 23.
Why BMI Matters for Your Health
Your Body Mass Index (BMI) gives you a quick snapshot of whether your weight is in a healthy range for your height. While it’s not a perfect measure, BMI is widely used by doctors and health organizations because it helps flag potential risks like obesity, diabetes, and heart disease. Knowing your BMI can guide you toward healthier lifestyle choices and early preventive care.
BMI Categories
- Underweight: BMI < 18.5
- Normal weight: BMI 18.5 – 24.9
- Overweight: BMI 25 – 29.9
- Obese: BMI ≥ 30
Healthy BMI Range by Age and Gender
| Age Group | Healthy BMI (Men) | Healthy BMI (Women) |
|---|---|---|
| 18–24 yrs | 19 – 24.9 | 18.5 – 24.9 |
| 25–34 yrs | 20 – 25 | 19 – 25 |
| 35–44 yrs | 21 – 26 | 20 – 26 |
| 45–54 yrs | 22 – 27 | 21 – 27 |
| 55–64 yrs | 23 – 28 | 22 – 28 |
| 65+ yrs | 24 – 29 | 23 – 29 |
Note: These are general guidelines. For Indians and South Asians, subtract 2–3 points from the upper limits for accurate assessment.
Why Use a BMI Calculator?
BMI provides a simple numeric measure of your weight relative to height, helping you understand if your weight is in a healthy range.
Track progress:
Monitor weight changes over time
Fitness goals:
Adjust diet and exercise based on BMI
Early detection:
Spot potential health risks quickly
Health awareness:
Stay informed about long-term risks
How to Calculate BMI
BMI = Weight (kg) ÷ Height (m²)
Example: 70kg ÷ (1.75m × 1.75m) = 22.9 (Normal Range)
Ideal BMI Chart by Age (General Guide)
| Age Group | Healthy BMI Range |
|---|---|
| 20–29 yrs | 18.5 – 24.9 |
| 30–39 yrs | 19 – 25 |
| 40–49 yrs | 20 – 26 |
| 50+ yrs | 21 – 27 |
Health Risks of Being Overweight
High BMI values may increase the risk of:
- Heart disease
- Type 2 diabetes
- High blood pressure
- Stroke
- Certain cancers
Risks of Being Underweight
Low BMI values may increase the risk of:
- Malnutrition
- Vitamin deficiencies
- Weak immune system
- Osteoporosis
- Fertility issues
Limitations of BMI
- Does not distinguish between muscle mass and body fat
- Not accurate for athletes, pregnant women, elderly individuals
- Does not account for ethnicity or body composition
- Other measures (waist-to-hip ratio, body fat %) can provide more insights
Lifestyle Tips for Maintaining a Healthy BMI
Follow these simple habits to maintain a healthy BMI and overall well-being.
- Eat a balanced diet with fruits, vegetables, proteins, and whole grains
- Exercise at least 30 minutes daily (walking, gym, yoga, sports)
- Get 7–8 hours of sleep every night
- Drink 2–3 liters of water daily
- Avoid excessive junk food, sugary drinks, and smoking
BMI Chart for Indians — Different Cutoffs
Standard BMI cutoffs were developed based on Western populations. Research shows that Indians and South Asians face health risks at lower BMI values. The Indian Council of Medical Research (ICMR) recommends adjusted cutoffs for Indians:
| Category | Standard BMI | BMI for Indians |
|---|---|---|
| Underweight | Below 18.5 | Below 18.5 |
| Normal weight | 18.5 – 24.9 | 18.5 – 22.9 |
| Overweight | 25 – 29.9 | 23 – 24.9 |
| Obese | 30 and above | 25 and above |
If you are of Indian or South Asian origin, use these adjusted values for a more accurate health assessment.
FAQs
Disclaimer: This BMI calculator is for informational purposes only and is not intended to replace professional medical advice.