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| BMI Category | BMI Range | Health Risk |
|---|---|---|
| Underweight | Below 18.5 | High |
| Healthy | 18.5 – 24.9 | Low |
| Overweight | 25.0 – 29.9 | Moderate |
| Obesity | 30.0 or above | High |
Find your height in the left column and look across to find your weight. The number at the top of the column is your BMI.
| Height | Normal | Overweight | Obese | Extreme Obesity | ||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | 32 | 33 | 34 | 35 | 36 | 40 | 42 | 44 | 46 | 48 | 50 | |
A BMI Calculator (Body Mass Index Calculator) is a free online tool that helps you determine whether your body weight is within a healthy range based on your height and weight. It calculates your BMI score and classifies it into categories such as underweight, normal weight, overweight, or obese.
This tool is ideal for:
Tracking fitness goals
Managing weight loss or gain
Understanding health risks
Our calculator uses the standard formula:
BMI = Weight (kg) / Height (m²)
You can choose between metric (kg/cm) and imperial (lbs/in) units.
Steps to calculate your BMI:
Enter your weight
Enter your height
Click “Calculate”
Instantly view your BMI and weight classification
Here are the general BMI categories based on WHO guidelines:
| BMI Range | Category |
|---|---|
| Below 18.5 | Underweight |
| 18.5–24.9 | Normal Weight |
| 25–29.9 | Overweight |
| 30 and above | Obese |
Instant results
Works for both men and women
Metric and imperial unit support
100% free and mobile-friendly
No login, no ads, no spam
Designed for all age groups*
*Note: Not suitable for children, athletes, or older adults. Consult a doctor for a complete health evaluation.
Identifies potential weight-related health risks
Helps in setting realistic health and fitness goals
Useful during medical consultations
Tracks weight status and progress over time
While the BMI formula remains the same, its interpretation may differ:
Asian populations may use lower thresholds for health risk
Fitness communities often combine BMI with body fat percentage
Our tool follows standard BMI guidelines with unit flexibility
| Height (ft/in) | 50 kg | 60 kg | 70 kg | 80 kg | 90 kg |
|---|---|---|---|---|---|
| 5’0″ | 22.0 | 26.4 | 30.7 | 35.1 | 39.5 |
| 5’5″ | 18.5 | 22.2 | 25.9 | 29.6 | 33.3 |
| 6’0″ | 17.0 | 20.3 | 23.7 | 27.0 | 30.4 |
These values are approximate and for adults only.
Whether you’re on a fitness journey or just monitoring your health, CalcNest’s BMI Calculator delivers quick and accurate results. Simple, reliable, and trusted by thousands, it’s your go-to tool for smarter health decisions.
BMI stands for Body Mass Index. It’s a calculation using height and weight to estimate body fat.
Yes, it follows global medical guidelines. However, for detailed results, consult a healthcare provider.
No. BMI for children requires age and sex-specific percentiles. This calculator is for adults 18+.
Not perfectly. BMI may show higher results due to muscle mass. For accuracy, use body scans or fat calipers.
Calcnest.online is your go-to platform for accurate, fast, and free online calculators. From finance to fitness, we help simplify your daily calculations so you can focus on what matters most.