Free BMI Calculator — Body Mass Index in Seconds
Enter your height and weight to get your body mass index and category immediately. Everything runs in your browser — your measurements never leave your device.
Inputs
Why people use this calculator
- Metric and imperial units supported
- Instant category: underweight, healthy, overweight, obese
- Pair with BMR and calorie tools to build a plan
- No signup, no ads blocking the result
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OpenFrequently asked questions
›What is a healthy BMI?
For most adults a BMI between 18.5 and 24.9 is considered the healthy range. BMI is a screening tool, not a diagnosis.
›Is BMI accurate for athletes?
Not always. Muscle is denser than fat, so very muscular people can show a high BMI while having low body fat. Use a body-fat calculator alongside it.
›Does BMI differ for men and women?
The BMI formula is the same, but body composition differs. Use body-fat percentage for a more personal picture.
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