BMI Calculator
Calculate your Body Mass Index (BMI) to assess your weight category and find your ideal weight range. Free, accurate, and easy to use with both imperial and metric units.
How It Works
1. Choose Your Units
Select between Imperial (pounds, feet, inches) or Metric (kilograms, centimeters) units based on your preference.
2. Enter Your Weight
Input your current body weight. Be as accurate as possible for the best results.
3. Enter Your Height
Provide your height. For imperial units, enter feet and inches separately. For metric, enter total centimeters.
4. View Your Results
Get your BMI score, weight category, and healthy weight range for your height instantly.
Examples
Example 1: Normal Weight Range
Weight: 150 lbs Height: 5 feet 8 inches BMI: 22.8 Category: Normal Weight Healthy Weight Range: 122 - 164 lbs This person falls within the healthy BMI range of 18.5-24.9, indicating a healthy weight for their height.
Example 2: Using Metric Units
Weight: 85 kg Height: 175 cm BMI: 27.8 Category: Overweight Healthy Weight Range: 57 - 76 kg This person is in the overweight category (BMI 25-29.9). Losing 9-10 kg would bring them into the healthy weight range.
Frequently Asked Questions
What is BMI and how is it calculated?
BMI (Body Mass Index) is a measure of body fat based on height and weight. It is calculated by dividing weight in kilograms by height in meters squared (kg/m²). For imperial units, the formula is: (weight in pounds × 703) ÷ (height in inches)².
What is a healthy BMI range?
A healthy BMI for adults is between 18.5 and 24.9. Below 18.5 is considered underweight, 25-29.9 is overweight, and 30 or above is classified as obese. However, BMI is just one health indicator and does not account for muscle mass, bone density, or body composition.
Is BMI accurate for everyone?
BMI is a useful screening tool but has limitations. It may not be accurate for athletes with high muscle mass, elderly individuals, pregnant women, or certain ethnic groups. BMI also does not distinguish between fat and muscle mass. Consult a healthcare provider for a comprehensive health assessment.
How can I improve my BMI?
To reach a healthy BMI, focus on balanced nutrition and regular physical activity. Aim for a gradual weight change of 1-2 pounds per week through a combination of healthy eating and exercise. Consult with healthcare professionals or registered dietitians for personalized guidance.
Does BMI differ for men and women?
The BMI calculation is the same for both men and women. However, women typically have more body fat than men at the same BMI. Despite this, the standard BMI categories are applied to both sexes for simplicity in screening.