BMI Calculator Plus

Calculate Body Mass Index with enhanced features including visual feedback, ideal weight range calculations, and unit conversion between metric and imperial systems. This comprehensive health tool provides color-coded BMI results, category classification from underweight to obese, and personalized health recommendations. Essential for health monitoring, fitness planning, medical consultations, and maintaining awareness of healthy weight ranges with professional health insights and guidance.
Visual Feedback Unit Conversion Health Categories Ideal Weight Range
Live Calculator
1337 × 42
56,154
Input: Height and weight
Output: BMI: 22.5 (Normal)
Units: Metric or Imperial
Calculate Your BMI
years
Enter your age (1-120)
kg
cm
ft
in
cm
Used for additional health metrics
Your BMI Results
--
--
  • Height: -- cm
  • Weight: -- kg
  • Ideal Weight Range: -- kg
  • Age & Sex: --
Underweight
<18.5
Normal
18.5-24.9
Overweight
25-29.9
Obesity
≥30
--
Average
10 18.5 25 30 40+
Caloric Needs

Based on your metrics and activity level

Basal Metabolic Rate: --
Daily Calories:
To maintain weight: --
To lose weight: --
To gain weight: --
Health Risk Assessment

Estimated based on BMI and waist circumference

Waist Circumference: --
Waist-to-Height Ratio: --
Risk Factors:
  • Please enter your measurements to see health risk assessment
BMI History
Date Weight BMI Category Actions
Your BMI history will appear here after you save your first result
About the BMI Calculator Plus

The Body Mass Index (BMI) is a value derived from a person's weight and height. It provides a simple numeric measure to assess whether a person has a healthy body weight for their height.

BMI Categories:
  • Underweight: BMI less than 18.5
  • Normal weight: BMI between 18.5 and 24.9
  • Overweight: BMI between 25 and 29.9
  • Obesity: BMI 30 or greater
More than just BMI

This advanced calculator also provides estimates for your caloric needs and health risk assessment based on additional metrics such as waist circumference and activity level.

Note: BMI is not a diagnostic tool and doesn't account for factors like muscle mass, bone density, and body composition. Always consult with healthcare professionals for a complete health assessment.

Help & Related Tools

Everything you need to know

FAQ Frequently Asked Questions

What is a healthy BMI range?
A healthy BMI typically ranges from 18.5 to 24.9, indicating normal weight for most adults. This range is associated with the lowest risk of weight-related health problems and is used as a standard guideline by healthcare professionals worldwide.
How accurate is BMI for health assessment?
BMI is a useful screening tool but has limitations. It does not account for muscle mass, bone density, or body composition. Athletes or very muscular individuals may have high BMI but low body fat. It is best used alongside other health indicators for a complete assessment.
Should I be concerned about my BMI results?
BMI is one health indicator among many. If your BMI is outside the normal range, consider consulting with a healthcare professional for a comprehensive health assessment. They can evaluate your individual circumstances and provide personalized advice.
Can I trust BMI if I am very muscular or athletic?
BMI may not be accurate for very muscular individuals, as muscle weighs more than fat. Athletes and bodybuilders often have high BMI scores despite having low body fat percentages. Consider additional measurements like body fat percentage or waist circumference for a more complete picture.
What is the difference between metric and imperial BMI calculations?
The BMI calculation is the same regardless of units - it is just a matter of conversion. Our calculator handles both metric (kg/cm) and imperial (lbs/inches) automatically, converting to the standard formula (weight in kg) / (height in meters)². The final BMI number and categories remain identical.

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