BMI Calculator

Check your Body Mass Index instantly with our free and accurate calculator tool

WHO
Standard
Metric
Imperial
Real-time
Results

Calculate Your BMI

Body Mass Index Calculator

Metric (kg/cm)
Imperial (lbs/ft/in)
--
--
Underweight
<18.5
Normal
18.5-24.9
Overweight
25-29.9
Obese
30+

BMI Calculator – Check Your Body Mass Index Instantly

Use our free and accurate BMI Calculator to calculate your Body Mass Index and assess whether you're underweight, healthy, overweight, or obese — based on WHO guidelines.

✅ What is BMI?

BMI (Body Mass Index) is a simple health indicator that compares your weight to your height to determine your general body condition. It's widely used by doctors, nutritionists, and fitness experts to assess health risks.

🔢 How Is BMI Calculated?

Choose either Metric (kg/cm) or Imperial (lbs/ft+in) units. Formulas used:

Metric BMI: BMI = weight (kg) ÷ [height (m)]²

Imperial BMI: BMI = (weight (lbs) ÷ [height (in)]²) × 703

📊 BMI Categories (According to WHO):

Underweight
BMI < 18.5

May indicate insufficient nutrition or underlying health conditions

Normal
18.5 – 24.9

Healthy weight range for most adults

Overweight
25 – 29.9

Increased risk for health problems

Obesity
30+

Higher risk of serious health conditions

🎯 Why Use This Tool?

  • Fast & accurate BMI calculation
  • Works with both metric and imperial units
  • Includes feet/inches height entry
  • Real-time results as you type
  • Fully mobile-friendly
  • No data is stored or tracked

This calculator is perfect for individuals tracking fitness, healthcare professionals, or personal trainers helping clients assess their progress.

⚠️ Note: BMI is a general tool and does not account for muscle mass or body composition. Always consult your doctor for a full health assessment.