BMI calculator
Calculate body mass index from height and weight.
BMI Calculator
Calculate your Body Mass Index (BMI) to assess if your weight is in a healthy range.
BMI Categories
BMI is a general indicator and doesn't account for muscle mass, bone density, or body composition. Consult a healthcare professional for a complete health assessment.
BMI Calculator Free, The Complete Guide
Use our BMI calculator free to instantly determine your body mass index. This body mass index calculator helps you understand whether your weight is healthy for your height, no signup required.
What is BMI and How to Calculate It?
BMI (Body Mass Index) uses height and weight to calculate BMI = weight(kg) / height(m)². Our calculator supports both metric and imperial units. Simply enter your measurements to check BMI online instantly.
Understanding BMI Categories
Our weight status calculator categorizes your BMI: Underweight (below 18.5), Normal weight (18.5-24.9), Overweight (25-29.9), and Obese (30+). These ranges help identify potential health risks.
Healthy Weight Checker
Beyond just a number, our healthy weight checker shows you the ideal weight range for your height. This helps you set realistic fitness goals and understand your target weight range.
Tips for Accurate BMI Calculation
- Measure your height without shoes for accuracy
- Weigh yourself in the morning before eating
- BMI does not account for muscle mass or body composition
- Consult a healthcare provider for personalized advice
Related Tools
More than a quick bmi calculator.
Body mass index, or BMI, is a screening measure that compares weight with height. This calculator supports metric and imperial units so you can quickly see the calculation and the commonly used BMI category.
BMI is not a diagnosis and does not account for every factor that can affect health, including muscle mass, age, pregnancy, or body composition. Use it as a starting point for a conversation with a qualified healthcare professional, not as personal medical advice.
How to use the bmi calculator.
Start with the tool above. There is no account step between you and the result.
- 01
Choose metric or imperial units.
- 02
Enter weight and height.
- 03
Review the BMI result and category.
BMI calculator answers.
Useful context before you use the result somewhere important.
What does BMI measure?
BMI is a weight-for-height screening calculation. It is one data point, not a complete assessment of health.
Can I use pounds and feet?
Yes. Switch to Imperial and enter pounds, feet, and inches.
Is this medical advice?
No. This tool provides a calculation only; speak with a healthcare professional about individual health questions.
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