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bmi-calculator.net

Health & EducationTools verifiedOct 1, 2026

Calculate your Body Mass Index and find your WHO weight category. BMI chart, formula explanation, and health risk information included.

calculate_bmiAction

Calculate Body Mass Index (BMI) from height and weight. Returns BMI value and WHO category (underweight, normal, overweight, obese class I/II/III).

View tool JSON

{
  "name": "calculate_bmi",
  "kind": "act",
  "impl": "imperative",
  "description": "Calculate Body Mass Index (BMI) from height and weight. Returns BMI value and WHO category (underweight, normal, overweight, obese class I/II/III).",
  "inputSchema": {
    "type": "object",
    "properties": {
      "weight_kg": {
        "type": "number",
        "description": "Weight in kilograms. Provide either weight_kg or weight_lbs."
      },
      "weight_lbs": {
        "type": "number",
        "description": "Weight in pounds."
      },
      "height_cm": {
        "type": "number",
        "description": "Height in centimeters. Provide either height_cm or height_feet+height_inches."
      },
      "height_feet": {
        "type": "number",
        "description": "Height feet component (e.g., 5 for 5'10\")."
      },
      "height_inches": {
        "type": "number",
        "description": "Height inches component (e.g., 10 for 5'10\")."
      }
    }
  }
}

calculate_bmrAction

Calculate Basal Metabolic Rate (BMR) - the calories your body needs at complete rest. Supports multiple formulas.

View tool JSON

{
  "name": "calculate_bmr",
  "kind": "act",
  "impl": "imperative",
  "description": "Calculate Basal Metabolic Rate (BMR) - the calories your body needs at complete rest. Supports multiple formulas.",
  "inputSchema": {
    "type": "object",
    "properties": {
      "weight_kg": {
        "type": "number",
        "description": "Weight in kilograms. Provide either weight_kg or weight_lbs."
      },
      "weight_lbs": {
        "type": "number",
        "description": "Weight in pounds."
      },
      "height_cm": {
        "type": "number",
        "description": "Height in centimeters. Provide either height_cm or height_feet+height_inches."
      },
      "height_feet": {
        "type": "number",
        "description": "Height feet component."
      },
      "height_inches": {
        "type": "number",
        "description": "Height inches component."
      },
      "age": {
        "type": "number",
        "description": "Age in years."
      },
      "gender": {
        "type": "string",
        "enum": [
          "male",
          "female"
        ],
        "description": "Biological sex."
      },
      "formula": {
        "type": "string",
        "enum": [
          "mifflin",
          "harris",
          "revised_harris",
          "schofield",
          "oxford"
        ],
        "description": "Formula to use. Default: mifflin (Mifflin-St Jeor, most accurate for most people)."
      }
    },
    "required": [
      "age",
      "gender"
    ]
  }
}

calculate_tdeeAction

Calculate Total Daily Energy Expenditure (TDEE) - total calories burned per day including activity. Based on BMR multiplied by activity factor.

View tool JSON

{
  "name": "calculate_tdee",
  "kind": "act",
  "impl": "imperative",
  "description": "Calculate Total Daily Energy Expenditure (TDEE) - total calories burned per day including activity. Based on BMR multiplied by activity factor.",
  "inputSchema": {
    "type": "object",
    "properties": {
      "weight_kg": {
        "type": "number",
        "description": "Weight in kilograms. Provide either weight_kg or weight_lbs."
      },
      "weight_lbs": {
        "type": "number",
        "description": "Weight in pounds."
      },
      "height_cm": {
        "type": "number",
        "description": "Height in centimeters. Provide either height_cm or height_feet+height_inches."
      },
      "height_feet": {
        "type": "number",
        "description": "Height feet component."
      },
      "height_inches": {
        "type": "number",
        "description": "Height inches component."
      },
      "age": {
        "type": "number",
        "description": "Age in years."
      },
      "gender": {
        "type": "string",
        "enum": [
          "male",
          "female"
        ],
        "description": "Biological sex."
      },
      "activity_level": {
        "type": "string",
        "enum": [
          "sedentary",
          "light",
          "moderate",
          "very_active",
          "extra_active"
        ],
        "description": "Activity level. sedentary=office job, light=1-3 days/week, moderate=3-5 days/week, very_active=6-7 days/week, extra_active=athlete/physical job."
      }
    },
    "required": [
      "age",
      "gender",
      "activity_level"
    ]
  }
}

calculate_body_fatAction

Estimate body fat percentage using the US Navy method from neck, waist, and hip measurements.

View tool JSON

{
  "name": "calculate_body_fat",
  "kind": "act",
  "impl": "imperative",
  "description": "Estimate body fat percentage using the US Navy method from neck, waist, and hip measurements.",
  "inputSchema": {
    "type": "object",
    "properties": {
      "gender": {
        "type": "string",
        "enum": [
          "male",
          "female"
        ],
        "description": "Biological sex."
      },
      "waist_cm": {
        "type": "number",
        "description": "Waist circumference in cm. Provide cm or inches."
      },
      "waist_inches": {
        "type": "number",
        "description": "Waist circumference in inches."
      },
      "neck_cm": {
        "type": "number",
        "description": "Neck circumference in cm."
      },
      "neck_inches": {
        "type": "number",
        "description": "Neck circumference in inches."
      },
      "hip_cm": {
        "type": "number",
        "description": "Hip circumference in cm (required for females)."
      },
      "hip_inches": {
        "type": "number",
        "description": "Hip circumference in inches (required for females)."
      },
      "height_cm": {
        "type": "number",
        "description": "Height in cm. Provide cm or feet+inches."
      },
      "height_feet": {
        "type": "number",
        "description": "Height feet component."
      },
      "height_inches": {
        "type": "number",
        "description": "Height inches component."
      }
    },
    "required": [
      "gender"
    ]
  }
}

calculate_ideal_weightAction

Calculate ideal body weight using multiple formulas (Devine, Robinson, Miller, Hamwi, Broca, Lemmens). Returns results from all formulas for comparison.

View tool JSON

{
  "name": "calculate_ideal_weight",
  "kind": "act",
  "impl": "imperative",
  "description": "Calculate ideal body weight using multiple formulas (Devine, Robinson, Miller, Hamwi, Broca, Lemmens). Returns results from all formulas for comparison.",
  "inputSchema": {
    "type": "object",
    "properties": {
      "gender": {
        "type": "string",
        "enum": [
          "male",
          "female"
        ],
        "description": "Biological sex."
      },
      "height_cm": {
        "type": "number",
        "description": "Height in cm. Provide cm or feet+inches."
      },
      "height_feet": {
        "type": "number",
        "description": "Height feet component."
      },
      "height_inches": {
        "type": "number",
        "description": "Height inches component."
      }
    },
    "required": [
      "gender"
    ]
  }
}

calculate_waist_to_height_ratioAction

Calculate Waist-to-Height Ratio (WHtR) - the strongest single predictor of cardiovascular risk. A ratio under 0.5 indicates healthy.

View tool JSON

{
  "name": "calculate_waist_to_height_ratio",
  "kind": "act",
  "impl": "imperative",
  "description": "Calculate Waist-to-Height Ratio (WHtR) - the strongest single predictor of cardiovascular risk. A ratio under 0.5 indicates healthy.",
  "inputSchema": {
    "type": "object",
    "properties": {
      "waist_cm": {
        "type": "number",
        "description": "Waist circumference in cm."
      },
      "waist_inches": {
        "type": "number",
        "description": "Waist circumference in inches."
      },
      "height_cm": {
        "type": "number",
        "description": "Height in cm."
      },
      "height_feet": {
        "type": "number",
        "description": "Height feet component."
      },
      "height_inches": {
        "type": "number",
        "description": "Height inches component."
      }
    }
  }
}

calculate_waist_to_hip_ratioAction

Calculate Waist-to-Hip Ratio (WHR) to assess fat distribution and cardiovascular health risk.

View tool JSON

{
  "name": "calculate_waist_to_hip_ratio",
  "kind": "act",
  "impl": "imperative",
  "description": "Calculate Waist-to-Hip Ratio (WHR) to assess fat distribution and cardiovascular health risk.",
  "inputSchema": {
    "type": "object",
    "properties": {
      "gender": {
        "type": "string",
        "enum": [
          "male",
          "female"
        ],
        "description": "Biological sex."
      },
      "waist_cm": {
        "type": "number",
        "description": "Waist circumference in cm."
      },
      "waist_inches": {
        "type": "number",
        "description": "Waist circumference in inches."
      },
      "hip_cm": {
        "type": "number",
        "description": "Hip circumference in cm."
      },
      "hip_inches": {
        "type": "number",
        "description": "Hip circumference in inches."
      }
    },
    "required": [
      "gender"
    ]
  }
}

calculate_calories_burnedAction

Estimate calories burned during physical activity using MET (Metabolic Equivalent of Task) values.

View tool JSON

{
  "name": "calculate_calories_burned",
  "kind": "act",
  "impl": "imperative",
  "description": "Estimate calories burned during physical activity using MET (Metabolic Equivalent of Task) values.",
  "inputSchema": {
    "type": "object",
    "properties": {
      "weight_kg": {
        "type": "number",
        "description": "Body weight in kg. Provide kg or lbs."
      },
      "weight_lbs": {
        "type": "number",
        "description": "Body weight in pounds."
      },
      "met_value": {
        "type": "number",
        "description": "MET value of the activity. Common values: walking(3.5), running(8-12), cycling(6-10), swimming(6-8), yoga(2.5), weight training(3-6)."
      },
      "duration_minutes": {
        "type": "number",
        "description": "Duration of activity in minutes."
      }
    },
    "required": [
      "met_value",
      "duration_minutes"
    ]
  }
}

calculate_bsaAction

Calculate Body Surface Area (BSA) using multiple formulas. Used in medical dosing calculations.

View tool JSON

{
  "name": "calculate_bsa",
  "kind": "act",
  "impl": "imperative",
  "description": "Calculate Body Surface Area (BSA) using multiple formulas. Used in medical dosing calculations.",
  "inputSchema": {
    "type": "object",
    "properties": {
      "weight_kg": {
        "type": "number",
        "description": "Weight in kg. Provide kg or lbs."
      },
      "weight_lbs": {
        "type": "number",
        "description": "Weight in pounds."
      },
      "height_cm": {
        "type": "number",
        "description": "Height in cm. Provide cm or feet+inches."
      },
      "height_feet": {
        "type": "number",
        "description": "Height feet component."
      },
      "height_inches": {
        "type": "number",
        "description": "Height inches component."
      }
    }
  }
}

list_calculatorsAnswer

List all available calculators on BMI-Calculator.net with descriptions and URLs.

View tool JSON

{
  "name": "list_calculators",
  "kind": "answer",
  "impl": "imperative",
  "description": "List all available calculators on BMI-Calculator.net with descriptions and URLs.",
  "inputSchema": {
    "type": "object",
    "properties": {}
  }
}