calc.engineer / General & Math / BMI Calculator

BMI Calculator v1.0.0

Calculate Body Mass Index (BMI) from weight and height using the WHO standard formula. Supports metric (kg/cm) and imperial (lbs/inches) units. Returns the BMI value, WHO classification (Underweight, Normal, Overweight, Obese Class I-III), and the healthy weight range for the given height. Formula: BMI = weight_kg / (height_m)^2. Useful for health screening, fitness planning, and clinical intake forms.

Body weight. Units determined by the 'unit' parameter.
Height. Units determined by the 'unit' parameter.
Unit system. 'metric' = kg and cm. 'imperial' = lbs and inches. Defaults to 'metric'.
Fill in the inputs and Compute to see the structured result.

From an agent (MCP) or the API

curl -X POST https://calc.engineer/api/bmi_calculator \
  -H "Content-Type: application/json" \
  -d '{"weight": …, "height": …, "unit": …}'

MCP: connect to https://calc.engineer/mcp and call bmi_calculator.

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