🧮 BMI Calculator

🧍‍♂️ Body Mass Index (BMI) — Complete Guide

What Is BMI?

Body Mass Index (BMI) is a simple number calculated from your height and weight. It gives a quick estimate of whether your body weight is in a healthy range for your height.

BMI doesn’t measure body fat directly, but it’s widely used by doctors and health professionals as a screening tool for weight categories linked to health risks.

🧮 How BMI Is Calculated

Your BMI is calculated using this formula:

$$\mathrm{BMI}=\frac{\mathrm{Weight}\left(\mathrm{kg}\right)}{{\left(\mathrm{Height}\right(m\left)\right)}^2}$$

So if you weigh 70 kg and your height is 1.75 m:

$$\mathrm{BMI}=\frac{70}{{\left(1.75\right)}^2}=\frac{70}{3.0625}\approx 22.9$$

The BMI Calculator on this page does this calculation instantly — no manual math needed.

📈 BMI Categories

Once the calculator gives you a number, it falls into one of these standard categories:

BMI Range	Category	What It Means
Below 18.5	Underweight	Weight may be too low for health
18.5 – 24.9	Normal weight	Healthy range — lowest risk range
25.0 – 29.9	Overweight	Above recommended; increased risk
30.0 and above	Obese	Higher risk for health issues

👉 These categories are based on global health guidelines.

🚀 How to Use This Calculator

• Enter your weight – Use kilograms (kg).
• Enter your height – Use centimeters (cm).
• Click Calculate – Instantly get your BMI score and your health category.

🤔 What Your BMI Score Means

👍 Healthy Range (18.5 – 24.9)

Indicates a balanced weight for your height. Associated with lowest health risks related to weight.

⚠️ Underweight (< 18.5)

May suggest low body weight for your height. Could be due to high metabolism, genetics, or nutritional deficiencies. If persistent, consult a health professional.

⚠️ Overweight (25 – 29.9)

Means your weight is above the weight ideal for your height. Higher risk for heart disease, diabetes, and joint issues over time.

❗ Obese (30+)

Significantly above ideal weight. Higher risk for chronic conditions such as:

• Type 2 diabetes
• High blood pressure
• Heart disease
• Sleep apnea

❗ Important Notes & Limitations

While BMI is useful, it has limitations:

• 🧠 It doesn’t tell you your body fat percentage. Two people with the same BMI could have very different body compositions (muscle vs. fat).
• 🏋️‍♂️ It doesn’t account for:
  • Muscle mass (e.g., athletes)
  • Bone density
  • Fat distribution
  • Age or gender differences
• 🧒 Not ideal for:
  • Children and teens (use age-specific growth charts)
  • Pregnant women

💡 FAQs

❓ Is BMI the same for everyone?

No — it’s a general tool. It’s most accurate for average adults, not athletes, bodybuilders, or people with very low/high muscle mass.

❓ Should I rely only on BMI?

No — use BMI with other health indicators:

• Waist circumference
• Body fat percentage
• Blood pressure
• Cholesterol and blood sugar levels

❓ What if my BMI is high?

A higher BMI doesn’t automatically mean poor health, but it can signal risk. A doctor can help you understand your overall health context.

🏁 Summary

The BMI Calculator on this page is a quick and easy way to gauge your weight relative to your height. It helps you:

• ✔ Check where your weight stands
• ✔ Understand basic health risk categories
• ✔ Get started on tracking your fitness journey

Remember — it’s one tool in a broader health picture.