BMI Calculator
Calculate your Body Mass Index (BMI) and health status with metric or imperial units and WHO categories.
Your unit choice and measurements are saved locally in this browser for convenience. Share links place the current values in the URL, so use them only when you want that information to appear in a link or browser history.
Your BMI
When to Use This BMI Calculator
Our free BMI calculator helps you monitor your health and wellness:
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Personal Health Monitoring
Track your body mass index regularly to monitor weight changes and maintain a healthy lifestyle.
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Fitness Goals
Set realistic weight loss or gain targets based on your current BMI and health category.
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Medical Consultations
Prepare for doctor visits with accurate BMI measurements to discuss health and wellness plans.
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Pregnancy Planning
Monitor BMI before and during pregnancy to ensure optimal health for both mother and baby.
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Sports & Athletics
Athletes and sports enthusiasts can track body composition changes as part of their training regimen.
Frequently Asked Questions
- Does this calculator save my measurements?
- Yes. The selected unit and entered measurements are saved locally in this browser so the calculator can restore them on your next visit. The calculation itself does not send them to AppDoesIt servers.
- What does the Share Link button include?
- It copies a URL containing the current unit and measurement values. Share it only if you are comfortable with that health information appearing in a link or browser history.
- Is BMI accurate for everyone?
- BMI is a useful screening reference, but it does not distinguish muscle from fat and may be less informative for athletes, pregnancy, or some medical situations.
- Should I use metric or imperial units?
- Use whichever system you prefer. The calculator converts both systems to the same BMI formula and gives the same result.
- Does this replace medical advice or work for children?
- No. This is a general adult screening tool, not a diagnosis. For children and teenagers use the Kids BMI Calculator, and speak with a clinician for personalised guidance.
BMI Calculator Help
How to Use
- Choose metric or imperial units, then enter your height and weight.
- Select Calculate BMI to see your score, WHO category, chart position, and guidance text.
- Use Share Link only when you want to copy a URL that includes your current measurements.
- Your values stay saved locally in this browser until you change them or clear this site's stored data.
Understanding BMI Categories
- Underweight (<18.5): May indicate nutritional deficiency or health issues. Consult a healthcare provider.
- Normal weight (18.5-24.9): Indicates a healthy weight range. Maintain through balanced diet and regular exercise.
- Overweight (25-29.9): May increase health risks. Consider lifestyle changes with professional guidance.
- Obese (≥30): Significantly increases health risks. Seek professional medical advice for a personalized plan.
Important Tips
- BMI is a screening tool for adults and does not account for muscle mass, body composition, pregnancy, or every medical context.
- This calculator saves your inputs locally for convenience, and shared links expose the current values in the URL.
- For ages 2-19 use the Kids BMI Calculator, and consult a healthcare professional for personalised advice.