BMI calculator
A screening-style estimate with a plain-language explainer. BMI is one data point — not a full health assessment.
BMI ≈ 24.2
Healthy weight range (general adult chart)
BMI is only one marker. Muscle mass, fat distribution, and overall health matter too.
Healthy-range explainer
- Under 18.5: underweight range on standard adult charts
- 18.5–24.9: often called the healthy weight range
- 25–29.9: overweight range
- 30+: obesity range
These cutoffs come from common adult screening charts. They are less useful for athletes with high muscle mass, pregnancy, and some other situations. BMI does not diagnose health.
What this result means
Body mass index (BMI) is a screening ratio of weight to height. On common adult charts, ranges are labeled underweight, healthy weight, overweight, and obesity. A single BMI value is one data point — not a diagnosis and not a complete picture of metabolic health.
Muscle mass, fat distribution, age, pregnancy, ethnicity-related risk patterns, and clinical history all matter. Two people with the same BMI can have very different health profiles.
Use BMI as a conversation starter with a clinician or registered dietitian, especially if your weight trend, waist size, blood pressure, glucose, or symptoms are changing.
How we calculate it
- Metric formula: BMI = weight (kg) ÷ [height (m)]².
- Imperial inputs are converted to metric using standard factors (1 lb = 0.45359237 kg; 1 in = 0.0254 m).
- Category labels follow widely published adult screening cutoffs: <18.5, 18.5–24.9, 25–29.9, and ≥30.
Limitations
- Less useful for athletes with high muscle mass, some older adults, pregnancy, and certain medical conditions.
- Does not measure body fat, visceral fat, fitness, or nutrient status.
- Not designed for children (pediatric charts differ).
- Does not replace clinical assessment.
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Sources / References
Educational estimate only — not diagnosis, treatment, or medication dosing. See our medical disclaimer and editorial policy.