Health & Fitness Calculators

• What Is BMI? Body Mass Index Explained

  Learn how body mass index is calculated, what WHO categories mean, and when BMI is a useful screening tool versus a misleading number.

• BMI Categories and Limitations

  Understand the full range of WHO BMI categories, obesity classes, population-specific cutoffs, and alternative metrics when BMI alone is not enough.

• TDEE and Calorie Deficits Explained

  Learn how total daily energy expenditure is estimated with Mifflin-St Jeor, how activity multipliers work, and how to set a safe calorie deficit for weight loss.

• What Are Macronutrients?

  Macronutrients—protein, carbohydrates, and fat—are the calorie-providing nutrients your body needs in large amounts daily.

• How TDEE Is Calculated

  Total daily energy expenditure (TDEE) estimates calories burned per day from basal metabolism, activity, and food digestion.

• Protein Intake Guidelines

  Protein intake guidelines vary by body weight, activity level, and goals—from baseline health to muscle gain and fat loss.

• BMR vs TDEE Explained

  BMR is calories burned at rest; TDEE is total daily burn including activity, movement, and digestion.

Free health and fitness calculators for BMI, daily calorie needs, TDEE, and macronutrient targets. All calculations run locally in your browser — not medical advice.

• Check BMI and healthy weight range for your height
• Estimate daily calories for weight loss or gain
• Calculate protein, carbs, and fat macro targets
• Plan nutrition alongside recipe and kitchen tools

• Body metrics

  BMI, ideal weight, and body composition estimates.

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  • BMI Calculator

• Nutrition

  Daily calories, TDEE, and macronutrient targets.

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  • Calorie Calculator
  • Macro Calculator