Standard BMI Calculator
Our Standard BMI Calculator is a simple and accurate tool that helps you understand your body weight in relation to your height. Based on the World Health Organization (WHO) guidelines, this calculator determines your BMI, weight status, ideal weight range, and how much weight you may need to gain or lose to reach a healthy range.
Whether you’re tracking fitness goals, monitoring weight loss, or simply staying informed about your health, this tool gives you the data you need in seconds.
🧮 What is BMI?
BMI (Body Mass Index) is a numerical value calculated from your weight and height. It helps categorize your body weight as:
- Underweight
- Normal weight
- Overweight
- Obese (Class I, II, III)
It is widely used by health professionals as a quick screening tool to assess whether a person is underweight, normal, overweight, or obese.
🔢 How to Use the BMI Calculator
- Enter your height (in centimeters).
- Enter your weight (in kilograms).
- Click the “Calculate BMI” button.
- View:
- Your BMI score
- Your weight category
- Ideal weight range
- Weight to gain/lose (if needed)
📊 Example
For someone who is 170 cm tall and weighs 85 kg:
- BMI = 29.4
- Status = Overweight
- Ideal Range = 53.5 – 72.1 kg
- Advice = Lose 12.9 kg to reach normal weight
✅ Features of This Tool
- 🚀 Instant BMI calculation
- 💡 WHO-based classification
- ⚖️ Shows healthy weight range
- ➕ Suggests weight change if needed
- 📋 Copy-to-clipboard functionality
- 📱 Fully mobile responsive
- 🔐 100% private – runs entirely in your browser
📚 BMI Categories (WHO)
| BMI Range | Classification |
|---|---|
| Less than 18.5 | Underweight |
| 18.5 – 24.9 | Normal weight |
| 25.0 – 29.9 | Overweight |
| 30.0 – 34.9 | Obese Class I |
| 35.0 – 39.9 | Obese Class II |
| 40.0 and above | Obese Class III |
⚖️ BMI Formula
BMI = Weight (kg) ÷ Height² (m²)
Example: A 70kg person at 1.75m = 70 ÷ (1.75²) = 22.86
❓ FAQ – BMI Explained
What’s the ideal BMI range?
Between 18.5 and 24.9, according to WHO standards.
Is BMI accurate for everyone?
BMI is a general guideline. It doesn’t account for muscle mass, bone density, age, or sex. Consult a doctor for a complete health assessment.
Can I calculate BMI manually?
Yes. Divide your weight (kg) by your height in meters squared.
Why does it show weight to lose/gain?
This helps users understand how far they are from the healthy BMI range.
Is this calculator safe to use?
Absolutely. No data is stored or shared. It works 100% locally in your browser.