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🧠 What is BMI (Body Mass Index)?

BMI (Body Mass Index) is a simple health metric that helps you understand whether your weight is in a healthy range for your height. It is calculated using your weight and height, and it gives a number that falls into one of the following categories:

BMI Range	Category
Below 18.5	Underweight
18.5 – 24.9	Normal weight
25 – 29.9	Overweight
30 and above	Obese

Knowing your BMI can help you take the right steps toward maintaining or achieving a healthy body weight.

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🔥 What is BMR and Daily Calorie Requirement?

BMR (Basal Metabolic Rate) is the number of calories your body needs to perform basic life functions — like breathing, digestion, and keeping warm — while at rest.

To calculate your Daily Calorie Requirement, we use your BMR and multiply it by your activity level. This gives a more accurate estimate of how many calories you need per day to:

• ✅ Maintain your current weight
• 🔻 Lose weight
• 🔺 Gain weight

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🧮 How This Calculator Works

This calculator uses two well-known formulas:

1. BMI Formula:
   BMI = weight (kg) / [height (m)]²
2. Calorie Formula (Mifflin-St Jeor Equation):
   Calculates BMR based on:
   • Gender
   • Age
   • Height
   • Weight
     Then multiplies by your activity level to estimate daily calorie needs.

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🏋️‍♂️ Why Use a BMI & Calorie Calculator?

• Understand your weight category (underweight, normal, overweight, obese)
• Get a clear idea of how many calories you need per day
• Set goals for weight loss, weight gain, or maintenance
• Make smarter decisions about your diet and fitness plan

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🙋 Frequently Asked Questions (FAQs)

❓ Is BMI an accurate measure of health?

BMI is a general guideline. It does not account for muscle mass, bone density, or fat distribution. It’s best used along with other health indicators like waist size and body fat percentage.

❓ How often should I check my BMI?

Checking once every 1–2 months is enough unless you’re on a weight gain or loss program.

❓ Can I lose weight just by reducing my calorie intake?

Reducing calorie intake helps, but a balanced diet and regular physical activity are key for sustainable weight loss.

❓ What is a healthy calorie deficit for weight loss?

A deficit of 500–700 calories per day can help you lose around 0.5 to 1 kg per week, which is considered safe and healthy.

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✅ Final Tip

This calculator is a helpful starting point, but always consult a nutritionist or doctor before making major changes to your diet or lifestyle.

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