BMI Calculator

Quickly check if your weight is in a healthy range.

Please enter a valid age (2-120 years)
Between 2 years to 120 years
Please enter a valid height
Please enter a valid weight

Your BMI is

27.5
Overweight

BMI Categories
< 18.5
18.5-24.9
25-29.9
≥ 30
Underweight Normal Overweight Obese

Healthy BMI range: 18.5 kg/m2 - 25 kg/m2

Related Tools

Mood Tracker
Try tool →
Calorie Calculator
Try tool →
Breathing Exercise
Try tool →
Physical Activity Calculator
Try tool →
The Healthiest Fruits
Try tool →
Height Converter
Try tool →
BMR Calculator
Try tool →
Bra Size Calculator
Try tool →
Heat Index Calculator
Try tool →

What is BMI?

BMI (Body Mass Index) is a simple measure that uses your weight and height to determine whether you are in a healthy weight range. It is widely used for weight management, fitness tracking, and general health assessment.

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

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 GroupHealthy BMI Range
20–29 yrs18.5 – 24.9
30–39 yrs19 – 25
40–49 yrs20 – 26
50+ yrs21 – 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

FAQs

Not always. It may not be reliable for athletes, elderly people, pregnant women, or those with high muscle mass.

Every 6–12 months, or whenever you notice major weight changes.

No, children require BMI percentiles based on age and gender.

Consult a healthcare professional for personalized advice and lifestyle guidance.

Disclaimer: This BMI calculator is for informational purposes only and is not intended to replace professional medical advice.