Body Mass Index (BMI) is a widely used tool to assess whether a person has a healthy body weight for their height. Our BMI calculator provides quick results, but to get the most accurate measurement, follow these tips:
1. Measure Your Height Accurately
For the most precise BMI calculation:
- Stand straight against a wall without shoes
- Use a flat object like a book to mark the top of your head
- Measure from the floor to the mark in centimeters or inches
- Measure at the same time of day (height can vary slightly throughout the day)
2. Weigh Yourself Properly
Weight measurements should be taken:
- First thing in the morning after using the bathroom
- Without heavy clothing
- On a hard, flat surface (not carpet)
- Using a calibrated scale
3. Understanding Your Results
BMI categories are:
- Underweight: Below 18.5
- Normal weight: 18.5 to 24.9
- Overweight: 25 to 29.9
- Obese: 30 or higher
While BMI is a useful screening tool, it has limitations. It doesn't directly measure body fat and may not account for muscle mass, bone density, or ethnic differences in body composition.
4. When to Consult a Healthcare Professional
Consider speaking with a doctor if:
- Your BMI is 30 or higher
- Your BMI suggests underweight and you're experiencing health issues
- You're an athlete with high muscle mass
- You have concerns about your weight and health
Our BMI calculator provides a good starting point for understanding your weight status, but it's not a diagnostic tool. For personalized health advice, always consult with a healthcare provider.