Free AI BMI Calculator

BMI is a simple screening tool to classify weight status and estimate body fat. It correlates with risks for conditions like cardiovascular disease, diabetes, and malnutrition. This calculator adjusts for units, interprets results based on WHO categories, and integrates symptoms to guide clinical decisions.

How to Use the BMI AI Calculator

Follow these steps to create your custom diagnostic report:

Patient Data Entry Guide

Step 1: Input Anthropometric Data

1. Weight: Enter the value followed by the unit (kg or lbs).
   • Example: 70 kg or 154 lbs
2. Height: Enter the value followed by the unit (cm, m, in, or ft).
   • Example: 175 cm, 1.75 m, 5'9" (69 in)

Step 2: Input Demographic Information

3. Age: Enter the patient’s age in years.
   • Example: 35
4. Sex: Specify the patient’s sex (Male/Female/Other).
   • Example: Female

Step 3: Input Symptoms

5. Symptoms: Describe symptoms or clinical concerns.
   • Example: Joint pain, shortness of breath, fatigue

Sample Diagnostic Report

BMI Calculation:

• Weight: 90 kg | Height: 1.75 m
• Formula: BMI=Weight (kg)[Height (m)]2=901.752=29.4 kg/m2BMI=[Height (m)]2Weight (kg)​=1.75290​=29.4kg/m2

Interpretation:

• BMI Category: Overweight (WHO Classification: 25.0–29.9 kg/m²)
• Risk Profile: Increased risk for hypertension, type 2 diabetes, and osteoarthritis.

Clinical Correlation:

• Symptoms like joint pain and shortness of breath may reflect mechanical stress from excess weight or early metabolic dysfunction.

Recommendations:

1. Assess blood pressure, fasting glucose, and lipid profile.
2. Encourage lifestyle modifications: balanced diet, aerobic exercise, and strength training.
3. Consider referral to a dietitian or weight management program.

Key Considerations

• Unit Conversions:
  • Imperial to Metric: Automatically converts lbs to kg (÷2.205÷2.205) and inches/meters to cm (×2.54×2.54).
  • Example: 150 lbs = 68 kg; 5'9" (69 in) = 175 cm.
• Limitations:
  • Does not differentiate between muscle mass and fat (e.g., athletes may have falsely elevated BMI).
  • Not suitable for pregnant women, children (<18), or individuals with edema/amputations.
• Pediatric Use: For patients under 20, BMI percentiles (age/sex-specific) are required.

Equations

1. Metric Formula:BMI=Weight (kg)[Height (m)]2BMI=[Height (m)]2Weight (kg)​
2. Imperial Formula:BMI=Weight (lbs)×703[Height (in)]2BMI=[Height (in)]2Weight (lbs)×703​

BMI Categories (WHO)

Final Diagnosis: Combines BMI, symptoms, and demographics to prioritize actionable steps (e.g., screen for metabolic syndrome in overweight adults with fatigue or address malnutrition in underweight patients with hair loss).