⚖️ BMI Calculator

A simple and efficient tool to calculate Body Mass Index (BMI) using metric or imperial units. Designed for developers, data pipelines, and health-related applications.

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🚀 Features

• 📏 Supports metric (kg/cm) and imperial (lbs/inches) units
• ⚡ Fast and accurate BMI calculation
• 🧠 Optional inputs: age and gender for extended insights
• 🛡️ Input validation with strict schema
• 🔌 Easy integration into APIs, scripts, and automation workflows

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📥 Input Schema

Field	Type	Required	Description
weight	number	✅ Yes	Body weight (kg or lbs based on unit)
height	number	✅ Yes	Height (cm or inches based on unit)
unit	string	❌ No	metric (default) or imperial
age	number	❌ No	Optional age in years
gender	string	❌ No	Optional: male or female

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⚙️ How It Works

📊 BMI Formula

• Metric:

BMI = weight (kg) / (height (m))²

• Imperial:

BMI = 703 × weight (lbs) / (height (in))²

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🧮 Example

Input

{
  "weight": 70,
  "height": 175,
  "unit": "metric"
}

Output

{
  "bmi": 22.86,
  "category": "Normal weight"
}

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📊 BMI Categories

BMI Range	Category
< 18.5	Underweight
18.5 – 24.9	Normal weight
25 – 29.9	Overweight
≥ 30	Obese

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🏗️ Use Cases

• Health and fitness apps
• API-based BMI services
• Data analysis pipelines
• Web or mobile applications
• Automation tools (Apify actors, etc.)

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⚡ Notes

• Height is automatically converted to meters when using metric
• age and gender are optional and do not affect BMI calculation directly
• Ensure valid numeric inputs for accurate results

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🛠️ Example Logic (Pseudo Code)

if unit == "metric":
    height_m = height / 100
    bmi = weight / (height_m ** 2)
else:
    bmi = 703 * weight / (height ** 2)

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📄 License

MIT License