BMI Calculator - Calculate Your Body Mass Index
Calculate your Body Mass Index (BMI) using height and weight to determine your weight status and health risk category
BMI Calculator
Your BMI Results
What is BMI (Body Mass Index)?
Body Mass Index (BMI) is a simple calculation that uses your height and weight to determine if you're in a healthy weight range. It's calculated by dividing your weight in kilograms by your height in meters squared.
BMI categories for adults:
- Underweight - BMI less than 18.5
- Normal weight - BMI 18.5 to 24.9
- Overweight - BMI 25.0 to 29.9
- Obese - BMI 30.0 and above
How BMI Calculator Works
The BMI calculation uses the formula:
For imperial units:
Our calculator automatically converts between metric and imperial units for your convenience.
Understanding BMI Results
BMI Accuracy
BMI is a screening tool, not a diagnostic measure. It doesn't account for muscle mass or body composition.
Health Risks
Higher BMI is associated with increased risk of heart disease, diabetes, and other health conditions.
How to Use This BMI Calculator
Choose Units
Select metric (kg/cm) or imperial (lbs/ft) units
Enter Weight
Input your current weight accurately
Enter Height
Input your height (cm or ft/in)
Get Results
View your BMI and weight status category
Benefits of Tracking Your BMI
- • Health Screening: Quick assessment of weight-related health risks.
- • Goal Setting: Establish realistic weight management targets.
- • Progress Tracking: Monitor changes in your weight status over time.
- • Health Awareness: Better understanding of your current health status.
Factors That Affect BMI Interpretation
1. Muscle Mass
Athletes and muscular individuals may have high BMI despite low body fat.
2. Age and Gender
BMI interpretation may vary slightly with age and between men and women.
3. Ethnicity
Some ethnic groups may have different health risk thresholds for BMI.
Frequently Asked Questions (FAQ)
Q: What is a healthy BMI range?
A: A healthy BMI range for adults is 18.5 to 24.9. Below 18.5 is considered underweight, 25.0 to 29.9 is overweight, and 30.0 and above is classified as obese.
Q: How accurate is BMI for measuring health?
A: BMI is a useful screening tool but has limitations. It doesn't distinguish between muscle and fat mass, so athletes or very muscular individuals may have high BMI despite being healthy.
Q: Can I use BMI if I'm pregnant?
A: BMI calculations are not accurate during pregnancy due to natural weight gain. Pregnant women should consult their healthcare provider for appropriate weight monitoring.
Q: Does age affect BMI calculations?
A: The standard BMI formula is the same for all adults, but interpretation may vary slightly with age. Older adults may have slightly higher healthy BMI ranges.